Summa Theologica Part I (Prima Pars) Part 116

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OF THOSE THINGS WHICH BELONG TO THE POWERS OF THE SOUL IN GENERAL (In Eight Articles)

We proceed to consider those things which belong to the powers of the soul; first, in general, secondly, in particular. Under the first head there are eight points of inquiry:

(1) Whether the essence of the soul is its power?

(2) Whether there is one power of the soul, or several?

(3) How the powers of the soul are distinguished from one another?

(4) Of the orders of the powers, one to another;

(5) Whether the powers of the soul are in it as in their subject?

(6) Whether the powers flow from the essence of the soul?

(7) Whether one power rises from another?

(8) Whether all the powers of the soul remain in the soul after death?

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FIRST ARTICLE [I, Q. 77, Art. 1]

Whether the Essence of the Soul Is Its Power?

Objection 1: It would seem that the essence of the soul is its power.

For Augustine says (De Trin. ix, 4), that "mind, knowledge, and love are in the soul substantially, or, which is the same thing, essentially": and (De Trin. x, 11), that "memory, understanding, and will are one life, one mind, one essence."

Obj. 2: Further, the soul is n.o.bler than primary matter. But primary matter is its own potentiality. Much more therefore is the soul its own power.

Obj. 3: Further, the substantial form is simpler than the accidental form; a sign of which is that the substantial form is not intensified or relaxed, but is indivisible. But the accidental form is its own power. Much more therefore is that substantial form which is the soul.

Obj. 4: Further, we sense by the sensitive power and we understand by the intellectual power. But "that by which we first sense and understand" is the soul, according to the Philosopher (De Anima ii, 2). Therefore the soul is its own power.

Obj. 5: Further, whatever does not belong to the essence is an accident. Therefore if the power of the soul is something else besides the essence thereof, it is an accident, which is contrary to Augustine, who says that the foregoing (see Obj. 1) "are not in the soul as in a subject as color or shape, or any other quality, or quant.i.ty, are in a body; for whatever is so, does not exceed the subject in which it is: Whereas the mind can love and know other things" (De Trin. ix, 4).

Obj. 6: Further, "a simple form cannot be a subject." But the soul is a simple form; since it is not composed of matter and form, as we have said above (Q. 75, A. 5). Therefore the power of the soul cannot be in it as in a subject.

Obj. 7: Further, an accident is not the principle of a substantial difference. But sensitive and rational are substantial differences; and they are taken from sense and reason, which are powers of the soul. Therefore the powers of the soul are not accidents; and so it would seem that the power of the soul is its own essence.

_On the contrary,_ Dionysius (Coel. Hier. xi) says that "heavenly spirits are divided into essence, power, and operation." Much more, then, in the soul is the essence distinct from the virtue or power.

_I answer that,_ It is impossible to admit that the power of the soul is its essence, although some have maintained it. For the present purpose this may be proved in two ways. First, because, since power and act divide being and every kind of being, we must refer a power and its act to the same genus. Therefore, if the act be not in the genus of substance, the power directed to that act cannot be in the genus of substance. Now the operation of the soul is not in the genus of substance; for this belongs to G.o.d alone, whose operation is His own substance. Wherefore the Divine power which is the principle of His operation is the Divine Essence itself. This cannot be true either of the soul, or of any creature; as we have said above when speaking of the angels (Q. 54, A. 3). Secondly, this may be also shown to be impossible in the soul. For the soul by its very essence is an act. Therefore if the very essence of the soul were the immediate principle of operation, whatever has a soul would always have actual vital actions, as that which has a soul is always an actually living thing. For as a form the soul is not an act ordained to a further act, but the ultimate term of generation. Wherefore, for it to be in potentiality to another act, does not belong to it according to its essence, as a form, but according to its power. So the soul itself, as the subject of its power, is called the first act, with a further relation to the second act. Now we observe that what has a soul is not always actual with respect to its vital operations; whence also it is said in the definition of the soul, that it is "the act of a body having life potentially"; which potentiality, however, "does not exclude the soul." Therefore it follows that the essence of the soul is not its power. For nothing is in potentiality by reason of an act, as act.

Reply Obj. 1: Augustine is speaking of the mind as it knows and loves itself. Thus knowledge and love as referred to the soul as known and loved, are substantially or essentially in the soul, for the very substance or essence of the soul is known and loved. In the same way are we to understand what he says in the other pa.s.sage, that those things are "one life, one mind, one essence." Or, as some say, this pa.s.sage is true in the sense in which the potential whole is predicated of its parts, being midway between the universal whole, and the integral whole. For the universal whole is in each part according to its entire essence and power; as animal in a man and in a horse; and therefore it is properly predicated of each part. But the integral whole is not in each part, neither according to its whole essence, nor according to its whole power. Therefore in no way can it be predicated of each part; yet in a way it is predicated, though improperly, of all the parts together; as if we were to say that the wall, roof, and foundations are a house. But the potential whole is in each part according to its whole essence, not, however, according to its whole power. Therefore in a way it can be predicated of each part, but not so properly as the universal whole. In this sense, Augustine says that the memory, understanding, and the will are the one essence of the soul.

Reply Obj. 2: The act to which primary matter is in potentiality is the substantial form. Therefore the potentiality of matter is nothing else but its essence.

Reply Obj. 3: Action belongs to the composite, as does existence; for to act belongs to what exists. Now the composite has substantial existence through the substantial form; and it operates by the power which results from the substantial form. Hence an active accidental form is to the substantial form of the agent (for instance, heat compared to the form of fire) as the power of the soul is to the soul.

Reply Obj. 4: That the accidental form is a principle of action is due to the substantial form. Therefore the substantial form is the first principle of action; but not the proximate principle. In this sense the Philosopher says that "the soul is that whereby we understand and sense."

Reply Obj. 5: If we take accident as meaning what is divided against substance, then there can be no medium between substance and accident; because they are divided by affirmation and negation, that is, according to existence in a subject, and non-existence in a subject. In this sense, as the power of the soul is not its essence, it must be an accident; and it belongs to the second species of accident, that of quality. But if we take accident as one of the five universals, in this sense there is a medium between substance and accident. For the substance is all that belongs to the essence of a thing; whereas whatever is beyond the essence of a thing cannot be called accident in this sense; but only what is not caused by the essential principle of the species. For the 'proper' does not belong to the essence of a thing, but is caused by the essential principles of the species; wherefore it is a medium between the essence and accident thus understood. In this sense the powers of the soul may be said to be a medium between substance and accident, as being natural properties of the soul. When Augustine says that knowledge and love are not in the soul as accidents in a subject, this must be understood in the sense given above, inasmuch as they are compared to the soul, not as loving and knowing, but as loved and known. His argument proceeds in this sense; for if love were in the soul loved as in a subject, it would follow that an accident transcends its subject, since even other things are loved through the soul.

Reply Obj. 6: Although the soul is not composed of matter and form, yet it has an admixture of potentiality, as we have said above (Q.

75, A. 5, ad 4); and for this reason it can be the subject of an accident. The statement quoted is verified in G.o.d, Who is the Pure Act; in treating of which subject Boethius employs that phrase (De Trin. i).

Reply Obj. 7: Rational and sensitive, as differences, are not taken from the powers of sense and reason, but from the sensitive and rational soul itself. But because substantial forms, which in themselves are unknown to us, are known by their accidents; nothing prevents us from sometimes subst.i.tuting accidents for substantial differences.

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SECOND ARTICLE [I, Q. 77, Art. 2]

Whether There Are Several Powers of the Soul?

Objection 1: It would seem that there are not several powers of the soul. For the intellectual soul approaches nearest to the likeness of G.o.d. But in G.o.d there is one simple power: and therefore also in the intellectual soul.

Obj. 2: Further, the higher a power is, the more unified it is. But the intellectual soul excels all other forms in power. Therefore above all others it has one virtue or power.

Obj. 3: Further, to operate belongs to what is in act. But by the one essence of the soul, man has actual existence in the different degrees of perfection, as we have seen above (Q. 76, AA. 3, 4).

Therefore by the one power of the soul he performs operations of various degrees.

_On the contrary,_ The Philosopher places several powers in the soul (De Anima ii, 2,3).

_I answer that,_ Of necessity we must place several powers in the soul. To make this evident, we observe that, as the Philosopher says (De Coelo ii, 12), the lowest order of things cannot acquire perfect goodness, but they acquire a certain imperfect goodness, by few movements; and those which belong to a higher order acquire perfect goodness by many movements; and those yet higher acquire perfect goodness by few movements; and the highest perfection is found in those things which acquire perfect goodness without any movement whatever. Thus he is least of all disposed of health, who can only acquire imperfect health by means of a few remedies; better disposed is he who can acquire perfect health by means of many remedies; and better still, he who can by few remedies; best of all is he who has perfect health without any remedies. We conclude, therefore, that things which are below man acquire a certain limited goodness; and so they have a few determinate operations and powers. But man can acquire universal and perfect goodness, because he can acquire beat.i.tude. Yet he is in the last degree, according to his nature, of those to whom beat.i.tude is possible; therefore the human soul requires many and various operations and powers. But to angels a smaller variety of powers is sufficient. In G.o.d there is no power or action beyond His own Essence.

There is yet another reason why the human soul abounds in a variety of powers--because it is on the confines of spiritual and corporeal creatures; and therefore the powers of both meet together in the soul.

Reply Obj. 1: The intellectual soul approaches to the Divine likeness, more than inferior creatures, in being able to acquire perfect goodness; although by many and various means; and in this it falls short of more perfect creatures.

Reply Obj. 2: A unified power is superior if it extends to equal things: but a multiform power is superior to it, if it is over many things.

Reply Obj. 3: One thing has one substantial existence, but may have several operations. So there is one essence of the soul, with several powers.

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THIRD ARTICLE [I, Q. 77, Art. 3]

Whether the Powers Are Distinguished by Their Acts and Objects?

Objection 1: It would seem that the powers of the soul are not distinguished by acts and objects. For nothing is determined to its species by what is subsequent and extrinsic to it. But the act is subsequent to the power; and the object is extrinsic to it. Therefore the soul's powers are not specifically distinct by acts and objects.

Obj. 2: Further, contraries are what differ most from each other.

Therefore if the powers are distinguished by their objects, it follows that the same power could not have contrary objects. This is clearly false in almost all the powers; for the power of vision extends to white and black, and the power to taste to sweet and bitter.

Obj. 3: Further, if the cause be removed, the effect is removed.

Hence if the difference of powers came from the difference of objects, the same object would not come under different powers. This is clearly false; for the same thing is known by the cognitive power, and desired by the appet.i.tive.

Obj. 4: Further, that which of itself is the cause of anything, is the cause thereof, wherever it is. But various objects which belong to various powers, belong also to some one power; as sound and color belong to sight and hearing, which are different powers, yet they come under the one power of common sense. Therefore the powers are not distinguished according to the difference of their objects.

_On the contrary,_ Things that are subsequent are distinguished by what precedes. But the Philosopher says (De Anima ii, 4) that "acts and operations precede the powers according to reason; and these again are preceded by their opposites," that is their objects.

Summa Theologica Part I (Prima Pars) Part 116

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Summa Theologica Part I (Prima Pars) Part 116 summary

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