Part II (Pars Prima Secundae) Part 116 (2/2)

_On the contrary,_ Augustine says (Retract. i, 9) that ”it is by the will that we sin, and live righteously.”

_I answer that,_ Sin is an act, as stated above (Q. 71, AA. 1, 6).

Now some acts pa.s.s into external matter, e.g. _to cut_ and _to burn_: and such acts have for their matter and subject, the thing into which the action pa.s.ses: thus the Philosopher states (Phys. iii, text. 18) that ”movement is the act of the thing moved, caused by a mover.” On the other hand, there are acts which do not pa.s.s into external matter, but remain in the agent, e.g. _to desire_ and _to know_: and such are all moral acts, whether virtuous or sinful. Consequently the proper subject of sin must needs be the power which is the principle of the act. Now since it is proper to moral acts that they are voluntary, as stated above (Q. 1, A. 1; Q. 18, A. 6), it follows that the will, which is the principle of voluntary acts, both of good acts, and of evil acts or sins, is the principle of sins. Therefore it follows that sin is in the will as its subject.

Reply Obj. 1: Evil is said to be outside the will, because the will does not tend to it under the aspect of evil. But since some evil is an apparent good, the will sometimes desires an evil, and in this sense is in the will.

Reply Obj. 2: If the defect in the apprehensive power were nowise subject to the will, there would be no sin, either in the will, or in the apprehensive power, as in the case of those whose ignorance is invincible. It remains therefore that when there is in the apprehensive power a defect that is subject to the will, this defect also is deemed a sin.

Reply Obj. 3: This argument applies to those efficient causes whose actions pa.s.s into external matter, and which do not move themselves, but move other things; the contrary of which is to be observed in the will; hence the argument does not prove.

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SECOND ARTICLE [I-II, Q. 74, Art. 2]

Whether the Will Alone Is the Subject of Sin?

Objection 1: It would seem that the will alone is the subject of sin.

For Augustine says (De Duabus Anim. x, 10) that ”no one sins except by the will.” Now the subject of sin is the power by which we sin.

Therefore the will alone is the subject of sin.

Obj. 2: Further, sin is an evil contrary to reason. Now good and evil pertaining to reason are the object of the will alone. Therefore the will alone is the subject of sin.

Obj. 3: Further, every sin is a voluntary act, because, as Augustine states (De Lib. Arb. iii, 18) [*Cf. De Vera Relig. xiv.], ”so true is it that every sin is voluntary, that unless it be voluntary, it is no sin at all.” Now the acts of the other powers are not voluntary, except in so far as those powers are moved by the will; nor does this suffice for them to be the subject of sin, because then even the external members of the body, which are moved by the will, would be a subject of sin; which is clearly untrue. Therefore the will alone is the subject of sin.

_On the contrary,_ Sin is contrary to virtue: and contraries are about one same thing. But the other powers of the soul, besides the will, are the subject of virtues, as stated above (Q. 56). Therefore the will is not the only subject of sin.

_I answer that,_ As was shown above (A. 1), whatever is the a principle of a voluntary act is a subject of sin. Now voluntary acts are not only those which are elicited by the will, but also those which are commanded by the will, as we stated above (Q. 6, A. 4) in treating of voluntariness. Therefore not only the will can be a subject of sin, but also all those powers which can be moved to their acts, or restrained from their acts, by the will; and these same powers are the subjects of good and evil moral habits, because act and habit belong to the same subject.

Reply Obj. 1: We do not sin except by the will as first mover; but we sin by the other powers as moved by the will.

Reply Obj. 2: Good and evil pertain to the will as its proper objects; but the other powers have certain determinate goods and evils, by reason of which they can be the subject of virtue, vice, and sin, in so far as they partake of will and reason.

Reply Obj. 3: The members of the body are not principles but merely organs of action: wherefore they are compared to the soul which moves them, as a slave who is moved but moves no other. On the other hand, the internal appet.i.tive powers are compared to reason as free agents, because they both act and are acted upon, as is made clear in _Polit._i, 3. Moreover, the acts of the external members are actions that pa.s.s into external matter, as may be seen in the blow that is inflicted in the sin of murder. Consequently there is no comparison.

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THIRD ARTICLE [I-II, Q. 74, Art. 3]

Whether There Can Be Sin in the Sensuality?

Objection 1: It would seem that there cannot be sin in the sensuality. For sin is proper to man who is praised or blamed for his actions. Now sensuality is common to us and irrational animals.

Therefore sin cannot be in the sensuality.

Obj. 2: Further, ”no man sins in what he cannot avoid,” as Augustine states (De Lib. Arb. iii, 18). But man cannot prevent the movement of the sensuality from being inordinate, since ”the sensuality ever remains corrupt, so long as we abide in this mortal life; wherefore it is signified by the serpent,” as Augustine declares (De Trin. xii, 12, 13). Therefore the inordinate movement of the sensuality is not a sin.

Obj. 3: Further, that which man himself does not do is not imputed to him as a sin. Now ”that alone do we seem to do ourselves, which we do with the deliberation of reason,” as the Philosopher says (Ethic. ix, 8). Therefore the movement of the sensuality, which is without the deliberation of reason, is not imputed to a man as a sin.

_On the contrary,_ It is written (Rom. 7:19): ”The good which I will I do not; but the evil which I will not, that I do”: which words Augustine explains (Contra Julian. iii, 26; De Verb. Apost. xii, 2, 3), as referring to the evil of concupiscence, which is clearly a movement of the sensuality. Therefore there can be sin in the sensuality.

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