Summa Th. I-II EN Qu.15 a.4

Whether consent to the act belongs only to the higher part of the soul?



Objection: 1. It would seem that consent to the act does not always belong to the higher reason. For "delight follows action, and perfects it, just as beauty perfects youth" [*oion tois akmaiois he hora)--as youthful vigor perfects a man in his prime] (Ethic. x, 4). But consent to delight belongs to the lower reason, as Augustine says (De Trin. xii, 12). Therefore consent to the act does not belong only to the higher reason.
2. Further, an act to which we consent is said to be voluntary. But it belongs to many powers to produce voluntary acts. Therefore the higher reason is not alone in consenting to the act.
3. Further, "the higher reason is that which is intent on the contemplation and consultation of things eternal," as Augustine says (De Trin. xii, 7). But man often consents to an act not for eternal, but for temporal reasons, or even on account of some passion of the soul. Therefore consent to an act does not belong to the higher reason alone.

On the contrary Augustine says (De Trin. xii, 12): "It is impossible for man to make up his mind to commit a sin, unless that mental faculty which has the sovereign power of urging his members to, or restraining them from, act, yield to the evil deed and become its slave."
I answer that The final decision belongs to him who holds the highest place, and to whom it belongs to judge of the others; for as long as judgment about some matter remains to be pronounced, the final decision has not been given. Now it is evident that it belongs to the higher reason to judge of all: since it is by the reason that we judge of sensible things; and of things pertaining to human principles we judge according to Divine principles, which is the function of the higher reason. Wherefore as long as a man is uncertain whether he resists or not, according to Divine principles, no judgment of the reason can be considered in the light of a final decision. Now the final decision of what is to be done is consent to the act. Therefore consent to the act belongs to the higher reason; but in that sense in which the reason includes the will, as stated above (Article [1], ad 1).

Reply to Objection: 1. Consent to delight in the work done belongs to the higher reason, as also does consent to the work; but consent to delight in thought belongs to the lower reason, just as to the lower reason it belongs to think. Nevertheless the higher reason exercises judgment on the fact of thinking or not thinking, considered as an action; and in like manner on the delight that results. But in so far as the act of thinking is considered as ordained to a further act, it belongs to the lower reason. For that which is ordained to something else, belongs to a lower art or power than does the end to which it is ordained: hence the art which is concerned with the end is called the master or principal art.
2. Since actions are called voluntary from the fact that we consent to them, it does not follow that consent is an act of each power, but of the will which is in the reason, as stated above (Article [1], ad 1), and from which the voluntary act is named.
3. The higher reason is said to consent not only because it always moves to act, according to the eternal reasons; but also because it fails to dissent according to those same reasons.



Q16: OF USE, WHICH IS AN ACT OF THE WILL IN REGARD TO THE MEANS (FOUR ARTICLES)




We must now consider use; concerning which there are four points of inquiry:

(1) Whether use is an act of the will?

(2) Whether it is to be found in irrational animals?

(3) Whether it regards the means only, or the end also?

(4) Of the relation of use to choice.



Whether use is an act of the will?



Objection: 1. It would seem that use is not an act of the will. For Augustine says (De Doctr. Christ. i, 4) that "to use is to refer that which is the object of use to the obtaining of something else." But "to refer" something to another is an act of the reason to which it belongs to compare and to direct. Therefore use is an act of the reason and not of the will.
2. Further, Damascene says (De Fide Orth. ii, 22) that man "goes forward to the operation, and this is called impulse; then he makes use (of the powers) and this is called use." But operation belongs to the executive power; and the act of the will does not follow the act of the executive power, on the contrary execution comes last. Therefore use is not an act of the will.
3. Further, Augustine says (Questions. 83, qu. 30): "All things that were made were made for man's use, because reason with which man is endowed uses all things by its judgment of them." But judgment of things created by God belongs to the speculative reason; which seems to be altogether distinct from the will, which is the principle of human acts. Therefore use is not an act of the will.

On the contrary Augustine says (De Trin. x, 11): "To use is to apply to something to purpose of the will."
I answer that The use of a thing implies the application of that thing to an operation: hence the operation to which we apply a thing is called its use; thus the use of a horse is to ride, and the use of a stick is to strike. Now we apply to an operation not only the interior principles of action, viz. the powers of the soul or the members of the body; as the intellect, to understand; and the eye, to see; but also external things, as a stick, to strike. But it is evident that we do not apply external things to an operation save through the interior principles which are either the powers of the soul, or the habits of those powers, or the organs which are parts of the body. Now it has been shown above (Question [9], Article [1]) that it is the will which moves the soul's powers to their acts, and this is to apply them to operation. Hence it is evident that first and principally use belongs to the will as first mover; to the reason, as directing; and to the other powers as executing the operation, which powers are compared to the will which applies them to act, as the instruments are compared to the principal agent. Now action is properly ascribed, not to the instrument, but to the principal agent, as building is ascribed to the builder, not to his tools. Hence it is evident that use is, properly speaking, an act of the will.

Reply to Objection: 1. Reason does indeed refer one thing to another; but the will tends to that which is referred by the reason to something else. And in this sense to use is to refer one thing to another.
2. Damascene is speaking of use in so far as it belongs to the executive powers.
3. Even the speculative reason is applied by the will to the act of understanding or judging. Consequently the speculative reason is said to use, in so far as it is moved by the will, in the same way as the other powers.



Whether use is to be found in irrational animals?



Objection: 1. It would seem that use is to be found in irrational animals. For it is better to enjoy than to use, because, as Augustine says (De Trin. x, 10): "We use things by referring them to something else which we are to enjoy." But enjoyment is to be found in irrational animals, as stated above (Question [11], Article [2]). Much more, therefore, is it possible for them to use.
2. Further, to apply the members to action is to use them. But irrational animals apply their members to action; for instance, their feet, to walk; their horns, to strike. Therefore it is possible for irrational animals to use.

On the contrary Augustine says (Questions. 83, qu. 30): "None but a rational animal can make use of a thing."
I answer that as stated above (Article [1]), to use is to apply an active principle to action: thus to consent is to apply the appetitive movement to the desire of something, as stated above (Question [15], Articles [1],2,3). Now he alone who has the disposal of a thing, can apply it to something else; and this belongs to him alone who knows how to refer it to something else, which is an act of the reason. And therefore none but a rational animal consents and uses.

Reply to Objection: 1. To enjoy implies the absolute movement of the appetite to the appetible: whereas to use implies a movement of the appetite to something as directed to something else. If therefore we compare use and enjoyment in respect of their objects, enjoyment is better than use; because that which is appetible absolutely is better than that which is appetible only as directed to something else. But if we compare them in respect of the apprehensive power that precedes them, greater excellence is required on the part of use: because to direct one thing to another is an act of reason; whereas to apprehend something absolutely is within the competency even of sense.
2. Animals by means of their members do something from natural instinct; not through knowing the relation of their members to these operations. Wherefore, properly speaking, they do not apply their members to action, nor do they use them.



Whether use regards also the last end?



Objection: 1. It would seem that use can regard also the last end. For Augustine says (De Trin. x, 11): "Whoever enjoys, uses." But man enjoys the last end. Therefore he uses the last end.
2. Further, "to use is to apply something to the purpose of the will" (De Trin. x, 11). But the last end, more than anything else, is the object of the will's application. Therefore it can be the object of use.
3. Further, Hilary says (De Trin. ii) that "Eternity is in the Father, Likeness in the Image," i.e. in the Son, "Use in the Gift," i.e. in the Holy Ghost. But the Holy Ghost, since He is God, is the last end. Therefore the last end can be the object of use.

On the contrary Augustine says (Questions. 83, qu. 30): "No one rightly uses God, but one enjoys Him." But God alone is the last end. Therefore we cannot use the last end.
I answer that Use, as stated above (Article [1]), implies the application of one thing to another. Now that which is applied to another is regarded in the light of means to an end; and consequently use always regards the means. For this reason things that are adapted to a certain end are said to be "useful"; in fact their very usefulness is sometimes called use.It must, however, be observed that the last end may be taken in two ways: first, simply; secondly, in respect of an individual. For since the end, as stated above (Question [1], Article [8]; Question [2], Article [7]), signifies sometimes the thing itself, and sometimes the attainment or possession of that thing (thus the miser's end is either money or the possession of it); it is evident that, simply speaking, the last end is the thing itself; for the possession of money is good only inasmuch as there is some good in money. But in regard to the individual, the obtaining of money is the last end; for the miser would not seek for money, save that he might have it. Therefore, simply and properly speaking, a man enjoys money, because he places his last end therein; but in so far as he seeks to possess it, he is said to use it.

Reply to Objection: 1. Augustine is speaking of use in general, in so far as it implies the relation of an end to the enjoyment which a man seeks in that end.
2. The end is applied to the purpose of the will, that the will may find rest in it. Consequently this rest in the end, which is the enjoyment thereof, is in this sense called use of the end. But the means are applied to the will's purpose, not only in being used as means, but as ordained to something else in which the will finds rest.
3. The words of Hilary refer to use as applicable to rest in the last end; just as, speaking in a general sense, one may be said to use the end for the purpose of attaining it, as stated above. Hence Augustine says (De Trin. vi, 10) that "this love, delight, felicity, or happiness, is called use by him."



Whether use precedes choice?



Objection: 1. It would seem that use precedes choice. For nothing follows after choice, except execution. But use, since it belongs to the will, precedes execution. Therefore it precedes choice also.
2. Further, the absolute precedes the relative. Therefore the less relative precedes the more relative. But choice implies two relations: one, of the thing chosen, in relation to the end; the other, of the thing chosen, in respect of that to which it is preferred; whereas use implies relation to the end only. Therefore use precedes choice.
3. Further, the will uses the other powers in so far as it removes them. But the will moves itself, too, as stated above (Question [9], Article [3]). Therefore it uses itself, by applying itself to act. But it does this when it consents. Therefore there is use in consent. But consent precedes choice as stated above (Question [15], Article [3], ad 3). Therefore use does also.

On the contrary Damascene says (De Fide Orth. ii, 22) that "the will after choosing has an impulse to the operation, and afterwards it uses (the powers)." Therefore use follows choice.
I answer that The will has a twofold relation to the thing willed. One, according as the thing willed is, in a way, in the willing subject, by a kind of proportion or order to the thing willed. Wherefore those things that are naturally proportionate to a certain end, are said to desire that end naturally. Yet to have an end thus is to have it imperfectly. Now every imperfect thing tends to perfection. And therefore both the natural and the voluntary appetite tend to have the end in reality; and this is to have it perfectly. This is the second relation of the will to the thing willed.Now the thing willed is not only the end, but also the means. And the last act that belongs to the first relation of the will to the means, is choice; for there the will becomes fully proportionate, by willing the means fully. Use, on the other hand, belongs to the second relation of the will, in respect of which it tends to the realization of the thing willed. Wherefore it is evident that use follows choice; provided that by use we mean the will's use of the executive power in moving it. But since the will, in a way, moves the reason also, and uses it, we may take the use of the means, as consisting in the consideration of the reason, whereby it refers the means to the end. In this sense use precedes choice.

Reply to Objection: 1. The motion of the will to the execution of the work, precedes execution, but follows choice. And so, since use belongs to that very motion of the will, it stands between choice and execution.
2. What is essentially relative is after the absolute; but the thing to which relation is referred need not come after. Indeed, the more a cause precedes, the more numerous the effects to which it has relation.
3. Choice precedes use, if they be referred to the same object. But nothing hinders the use of one thing preceding the choice of another. And since the acts of the will react on one another, in each act of the will we can find both consent and choice and use; so that we may say that the will consents to choose, and consents to consent, and uses itself in consenting and choosing. And such acts as are ordained to that which precedes, precede also.




Q17: OF THE ACTS COMMANDED BY THE WILL (NINE ARTICLES)




We must now consider the acts commanded by the will; under which head there are nine points of inquiry:

(1) Whether command is an act of the will or of the reason?

(2) Whether command belongs to irrational animals?

(3) Of the order between command and use

(4) Whether command and the commanded act are one act or distinct?

(5) Whether the act of the will is commanded?

(6) Whether the act of the reason is commanded?

(7) Whether the act of the sensitive appetite is commanded?

(8) Whether the act of the vegetal soul is commanded?

(9) Whether the acts of the external members are commanded?



Whether command is an act of the reason or of the will?



Objection: 1. It would seem that command is not an act of the reason but of the will. For command is a kind of motion; because Avicenna says that there are four ways of moving, "by perfecting, by disposing, by commanding, and by counselling." But it belongs to the will to move all the other powers of the soul, as stated above (Question [9], Article [1]). Therefore command is an act of the will.
2. Further, just as to be commanded belongs to that which is subject, so, seemingly, to command belongs to that which is most free. But the root of liberty is especially in the will. Therefore to command belongs to the will.
3. Further, command is followed at once by act. But the act of the reason is not followed at once by act: for he who judges that a thing should be done, does not do it at once. Therefore command is not an act of the reason, but of the will.

On the contrary Gregory of Nyssa [*Nemesius, De Nat. Hom. xvi.] and the Philosopher (Ethic. i, 13) say that "the appetite obeys reason." Therefore command is an act of the reason.
I answer that Command is an act of the reason presupposing, however, an act of the will. In proof of this, we must take note that, since the acts of the reason and of the will can be brought to bear on one another, in so far as the reason reasons about willing, and the will wills to reason, the result is that the act of the reason precedes the act of the will, and conversely. And since the power of the preceding act continues in the act that follows, it happens sometimes that there is an act of the will in so far as it retains in itself something of an act of the reason, as we have stated in reference to use and choice; and conversely, that there is an act of the reason in so far as it retains in itself something of an act of the will.Now, command is essentially indeed an act of the reason: for the commander orders the one commanded to do something, by way of intimation or declaration; and to order thus by intimating or declaring is an act of the reason. Now the reason can intimate or declare something in two ways. First, absolutely: and this intimation is expressed by a verb in the indicative mood, as when one person says to another: "This is what you should do." Sometimes, however, the reason intimates something to a man by moving him thereto; and this intimation is expressed by a verb in the imperative mood; as when it is said to someone: "Do this." Now the first mover, among the powers of the soul, to the doing of an act is the will, as stated above (Question [9], Article [1]). Since therefore the second mover does not move, save in virtue of the first mover, it follows that the very fact that the reason moves by commanding, is due to the power of the will. Consequently it follows that command is an act of the reason, presupposing an act of the will, in virtue of which the reason, by its command, moves (the power) to the execution of the act.

Reply to Objection: 1. To command is to move, not anyhow, but by intimating and declaring to another; and this is an act of the reason.
2. The root of liberty is the will as the subject thereof; but it is the reason as its cause. For the will can tend freely towards various objects, precisely because the reason can have various perceptions of good. Hence philosophers define the free-will as being "a free judgment arising from reason," implying that reason is the root of liberty.
3. This argument proves that command is an act of reason not absolutely, but with a kind of motion as stated above.



Whether command belongs to irrational animals?



Objection: 1. It would seem that command belongs to irrational animals. Because, according to Avicenna, "the power that commands movement is the appetite; and the power that executes movement is in the muscles and nerves." But both powers are in irrational animals. Therefore command is to be found in irrational animals.
2. Further, the condition of a slave is that of one who receives commands. But the body is compared to the soul as a slave to his master, as the Philosopher says (Polit. i, 2). Therefore the body is commanded by the soul, even in irrational animals, since they are composed of soul and body.
3. Further, by commanding, man has an impulse towards an action. But impulse to action is to be found in irrational animals, as Damascene says (De Fide Orth. ii, 22). Therefore command is to be found in irrational animals.

On the contrary Command is an act of reason, as stated above (Article [1]). But in irrational animals there is no reason. Neither, therefore, is there command.
I answer that To command is nothing else than to direct someone to do something, by a certain motion of intimation. Now to direct is the proper act of reason. Wherefore it is impossible that irrational animals should command in any way, since they are devoid of reason.

The appetitive power is said to command movement, in so far as it moves the commanding reason. But this is only in man. In irrational animals the appetitive power is not, properly speaking, a commanding faculty, unless command be taken loosely for motion.
Reply to Objection: 1. The body of the irrational animal is competent to obey; but its soul is not competent to command, because it is not competent to direct. Consequently there is no ratio there of commander and commanded; but only of mover and moved.
2. Impulse to action is in irrational animals otherwise than in man. For the impulse of man to action arises from the directing reason; wherefore his impulse is one of command. On the other hand, the impulse of the irrational animal arises from natural instinct; because as soon as they apprehend the fitting or the unfitting, their appetite is moved naturally to pursue or to avoid. Wherefore they are directed by another to act; and they themselves do not direct themselves to act. Consequently in them is impulse but not command.



Whether use precedes command?



Objection: 1. It would seem that use precedes command. For command is an act of the reason presupposing an act of the will, as stated above (Article [1]). But, as we have already shown (Question [16], Article [1]), use is an act of the will. Therefore use precedes command.
2. Further, command is one of those things that are ordained to the end. But use is of those things that are ordained to the end. Therefore it seems that use precedes command.
3. Further, every act of a power moved by the will is called use; because the will uses the other powers, as stated above (Question [16], Article [1]). But command is an act of the reason as moved by the will, as stated above (Article [1]). Therefore command is a kind of use. Now the common precedes the proper. Therefore use precedes command.

On the contrary Damascene says (De Fide Orth. ii, 22) that impulse to action precedes use. But impulse to operation is given by command. Therefore command precedes use.
I answer that use of that which is directed to the end, in so far as it is in the reason referring this to the end, precedes choice, as stated above (Question [16], Article [4]). Wherefore still more does it precede command. On the other hand, use of that which is directed to the end, in so far as it is subject to the executive power, follows command; because use in the user is united to the act of the thing used; for one does not use a stick before doing something with the stick. But command is not simultaneous with the act of the thing to which the command is given: for it naturally precedes its fulfilment, sometimes, indeed, by priority of time. Consequently it is evident that command precedes use.

Reply to Objection: 1. Not every act of the will precedes this act of the reason which is command; but an act of the will precedes, viz. choice; and an act of the will follows, viz. use. Because after counsel's decision, which is reason's judgment, the will chooses; and after choice, the reason commands that power which has to do what was chosen; and then, last of all, someone's will begins to use, by executing the command of reason; sometimes it is another's will, when one commands another; sometimes the will of the one that commands, when he commands himself to do something.
2. Just as act ranks before power, so does the object rank before the act. Now the object of use is that which is directed to the end. Consequently, from the fact that command precedes, rather than that it follows use.
3. Just as the act of the will in using the reason for the purpose of command, precedes the command; so also we may say that this act whereby the will uses the reason, is preceded by a command of reason; since the acts of these powers react on one another.



Whether command and the commanded act are one act, or distinct?



Objection: 1. It would seem that the commanded act is not one with the command itself. For the acts of different powers are themselves distinct. But the commanded act belongs to one power, and the command to another; since one is the power that commands, and the other is the power that receives the command. Therefore the commanded act is not one with the command.
2. Further, whatever things can be separate from one another, are distinct: for nothing is severed from itself. But sometimes the commanded act is separate from the command: for sometimes the command is given, and the commanded act follows not. Therefore command is a distinct act from the act commanded.
3. Further, whatever things are related to one another as precedent and consequent, are distinct. But command naturally precedes the commanded act. Therefore they are distinct.

On the contrary The Philosopher says (Topic. iii, 2) that "where one thing is by reason of another, there is but one." But there is no commanded act unless by reason of the command. Therefore they are one.
I answer that Nothing prevents certain things being distinct in one respect, and one in another respect. Indeed, every multitude is one in some respect, as Dionysius says (Div. Nom. xiii). But a difference is to be observed in this, that some are simply many, and one in a particular aspect: while with others it is the reverse. Now "one" is predicated in the same way as "being." And substance is being simply, whereas accident or being "of reason" is a being only in a certain respect. Wherefore those things that are one in substance are one simply, though many in a certain respect. Thus, in the genus substance, the whole composed of its integral or essential parts, is one simply: because the whole is being and substance simply, and the parts are being and substances in the whole. But those things which are distinct in substance, and one according to an accident, are distinct simply, and one in a certain respect: thus many men are one people, and many stones are one heap; which is unity of composition or order. In like manner also many individuals that are one in genus or species are many simply, and one in a certain respect: since to be one in genus or species is to be one according to the consideration of the reason.Now just as in the genus of natural things, a whole is composed of matter and form (e.g. man, who is one natural being, though he has many parts, is composed of soul and body); so, in human acts, the act of a lower power is in the position of matter in regard to the act of a higher power, in so far as the lower power acts in virtue of the higher power moving it: for thus also the act of the first mover is as the form in regard to the act of its instrument. Hence it is evident that command and the commanded act are one human act, just as a whole is one, yet in its parts, many.

Reply to Objection: 1. If the distinct powers are not ordained to one another, their acts are diverse simply. But when one power is the mover of the other, then their acts are, in a way, one: since "the act of the mover and the act of the thing moved are one act" (Phys. iii, 3).
2. The fact that command and the commanded act can be separated from one another shows that they are different parts. Because the parts of a man can be separated from one another, and yet they form one whole.
3. In those things that are many in parts, but one as a whole, nothing hinders one part from preceding another. Thus the soul, in a way, precedes the body; and the heart, the other members.



: Whether the act of the will is commanded?


Objection: 1. It would seem that the act of the will is not commanded. For Augustine says (Confess. viii, 9): "The mind commands the mind to will, and yet it does not." But to will is the act of the will. Therefore the act of the will is not commanded.
2. Further, to receive a command belongs to one who can understand the command. But the will cannot understand the command; for the will differs from the intellect, to which it belongs to understand. Therefore the act of the will is not commanded.
3. Further, if one act of the will is commanded, for the same reason all are commanded. But if all the acts of the will are commanded, we must needs proceed to infinity; because the act of the will precedes the act of reason commanding, as stated above (Article [1]); for if that act of the will be also commanded, this command will be precedes by another act of the reason, and so on to infinity. But to proceed to infinity is not possible. Therefore the act of the will is not commanded.

On the contrary Whatever is in our power, is subject to our command. But the acts of the will, most of all, are in our power; since all our acts are said to be in our power, in so far as they are voluntary. Therefore the acts of the will are commanded by us.
I answer that As stated above (Article [1]), command is nothing else than the act of the reason directing, with a certain motion, something to act. Now it is evident that the reason can direct the act of the will: for just as it can judge it to be good to will something, so it can direct by commanding man to will. From this it is evident that an act of the will can be commanded.

Reply to Objection: 1. As Augustine says (Confess. viii, 9) when the mind commands itself perfectly to will, then already it wills: but that sometimes it commands and wills not, is due to the fact that it commands imperfectly. Now imperfect command arises from the fact that the reason is moved by opposite motives to command or not to command: wherefore it fluctuates between the two, and fails to command perfectly.
2. Just as each of the members of the body works not for itself alone but for the whole body; thus it is for the whole body that the eye sees; so is it with the powers of the soul. For the intellect understands, not for itself alone, but for all the powers; and the will wills not only for itself, but for all the powers too. Wherefore man, in so far as he is endowed with intellect and will, commands the act of the will for himself.
3. Since command is an act of reason, that act is commanded which is subject to reason. Now the first act of the will is not due to the direction of the reason but to the instigation of nature, or of a higher cause, as stated above (Question [9], Article [4]). Therefore there is no need to proceed to infinity.





Whether the act of the reason is commanded?



Objection: 1. It would seem that the act of the reason cannot be commanded. For it seems impossible for a thing to command itself. But it is the reason that commands, as stated above (Article [1]). Therefore the act of the reason is not commanded.
2. Further, that which is essential is different from that which is by participation. But the power whose act is commanded by reason, is rational by participation, as stated in Ethic. i, 13. Therefore the act of that power, which is essentially rational, is not commanded.
3. Further, that act is commanded, which is in our power. But to know and judge the truth, which is the act of reason, is not always in our power. Therefore the act of the reason cannot be commanded.

On the contrary That which we do of our free-will, can be done by our command. But the acts of the reason are accomplished through the free-will: for Damascene says (De Fide Orth. ii, 22) that "by his free-will man inquires, considers, judges, approves." Therefore the acts of the reason can be commanded.
I answer that Since the reason reacts on itself, just as it directs the acts of other powers, so can it direct its own act. Consequently its act can be commanded.But we must take note that the act of the reason may be considered in two ways. First, as to the exercise of the act. And considered thus, the act of the reason can always be commanded: as when one is told to be attentive, and to use one's reason. Secondly, as to the object; in respect of which two acts of the reason have to be noticed. One is the act whereby it apprehends the truth about something. This act is not in our power: because it happens in virtue of a natural or supernatural light. Consequently in this respect, the act of the reason is not in our power, and cannot be commanded. The other act of the reason is that whereby it assents to what it apprehends. If, therefore, that which the reason apprehends is such that it naturally assents thereto, e.g. the first principles, it is not in our power to assent or dissent to the like: assent follows naturally, and consequently, properly speaking, is not subject to our command. But some things which are apprehended do not convince the intellect to such an extent as not to leave it free to assent or dissent, or at least suspend its assent or dissent, on account of some cause or other; and in such things assent or dissent is in our power, and is subject to our command.

Reply to Objection: 1. Reason commands itself, just as the will moves itself, as stated above (Question [9], Article [3]), that is to say, in so far as each power reacts on its own acts, and from one thing tends to another.
2. On account of the diversity of objects subject to the act of the reason, nothing prevents the reason from participating in itself: thus the knowledge of principles is participated in the knowledge of the conclusions.
3. The reply to the third object is evident from what has been said.




Summa Th. I-II EN Qu.15 a.4