Part II (Pars Prima Secundae) Part 119 (1/2)

We must now consider the causes of sin: (1) in general; (2) in particular. Under the first head there are four points of inquiry:

(1) Whether sin has a cause?

(2) Whether it has an internal cause?

(3) Whether it has an external cause?

(4) Whether one sin is the cause of another?

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FIRST ARTICLE [I-II, Q. 75, Art. 1]

Whether Sin Has a Cause?

Objection 1: It would seem that sin has no cause. For sin has the nature of evil, as stated above (Q. 71, A. 6). But evil has no cause, as Dionysius says (Div. Nom. iv). Therefore sin has no cause.

Obj. 2: Further, a cause is that from which something follows of necessity. Now that which is of necessity, seems to be no sin, for every sin is voluntary. Therefore sin has no cause.

Obj. 3: Further, if sin has a cause, this cause is either good or evil. It is not a good, because good produces nothing but good, for ”a good tree cannot bring forth evil fruit” (Matt. 7:18). Likewise neither can evil be the cause of sin, because the evil of punishment is a sequel to sin, and the evil of guilt is the same as sin.

Therefore sin has no cause.

_On the contrary,_ Whatever is done has a cause, for, according to Job 5:6, ”nothing upon earth is done without a cause.” But sin is something done; since it a ”word, deed, or desire contrary to the law of G.o.d.” Therefore sin has a cause.

_I answer that,_ A sin is an inordinate act. Accordingly, so far as it is an act, it can have a direct cause, even as any other act; but, so far as it is inordinate, it has a cause, in the same way as a negation or privation can have a cause. Now two causes may be a.s.signed to a negation: in the first place, absence of the cause of affirmation; i.e. the negation of the cause itself, is the cause of the negation in itself; since the result of removing the cause is the removal of the effect: thus the absence of the sun is the cause of darkness. In the second place, the cause of an affirmation, of which a negation is a sequel, is the accidental cause of the resulting negation: thus fire by causing heat in virtue of its princ.i.p.al tendency, consequently causes a privation of cold. The first of these suffices to cause a simple negation. But, since the inordinateness of sin and of every evil is not a simple negation, but the privation of that which something ought naturally to have, such an inordinateness must needs have an accidental efficient cause. For that which naturally is and ought to be in a thing, is never lacking except on account of some impeding cause. And accordingly we are wont to say that evil, which consists in a certain privation, has a deficient cause, or an accidental efficient cause. Now every accidental cause is reducible to the direct cause. Since then sin, on the part of its inordinateness, has an accidental efficient cause, and on the part of the act, a direct efficient cause, it follows that the inordinateness of sin is a result of the cause of the act. Accordingly then, the will lacking the direction of the rule of reason and of the Divine law, and intent on some mutable good, causes the act of sin directly, and the inordinateness of the act, indirectly, and beside the intention: for the lack of order in the act results from the lack of direction in the will.

Reply Obj. 1: Sin signifies not only the privation of good, which privation is its inordinateness, but also the act which is the subject of that privation, which has the nature of evil: and how this evil has a cause, has been explained.

Reply Obj. 2: If this definition is to be verified in all cases, it must be understood as applying to a cause which is sufficient and not impeded. For it happens that a thing is the sufficient cause of something else, and that the effect does not follow of necessity, on account of some supervening impediment: else it would follow that all things happen of necessity, as is proved in _Metaph._ vi, text. 5.

Accordingly, though sin has a cause, it does not follow that this is a necessary cause, since its effect can be impeded.

Reply Obj. 3: As stated above, the will in failing to apply the rule of reason or of the Divine law, is the cause of sin. Now the fact of not applying the rule of reason or of the Divine law, has not in itself the nature of evil, whether of punishment or of guilt, before it is applied to the act. Wherefore accordingly, evil is not the cause of the first sin, but some good lacking some other good.

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SECOND ARTICLE [I-II, Q. 75, Art. 2]

Whether Sin Has an Internal Cause?

Objection 1: It would seem that sin has no internal cause. For that which is within a thing is always in it. If therefore sin had an internal cause, man would always be sinning, since given the cause, the effect follows.

Obj. 2: Further, a thing is not its own cause. But the internal movements of a man are sins. Therefore they are not the cause of sin.

Obj. 3: Further, whatever is within man is either natural or voluntary. Now that which is natural cannot be the cause of sin, for sin is contrary to nature, as Damascene states (De Fide Orth. ii, 3; iv, 21); while that which is voluntary, if it be inordinate, is already a sin. Therefore nothing intrinsic can be the cause of the first sin.

_On the contrary,_ Augustine says (De Duabus Anim. x, 10, 11; Retract. i, 9) that ”the will is the cause of sin.”

_I answer that,_ As stated above (A. 1), the direct cause of sin must be considered on the part of the act. Now we may distinguish a twofold internal cause of human acts, one remote, the other proximate. The proximate internal cause of the human act is the reason and will, in respect of which man has a free-will; while the remote cause is the apprehension of the sensitive part, and also the sensitive appet.i.te. For just as it is due to the judgment of reason, that the will is moved to something in accord with reason, so it is due to an apprehension of the senses that the sensitive appet.i.te is inclined to something; which inclination sometimes influences the will and reason, as we shall explain further on (Q. 77, A. 1).

Accordingly a double interior cause of sin may be a.s.signed; one proximate, on the part of the reason and will; and the other remote, on the part of the imagination or sensitive appet.i.te.

But since we have said above (A. 1, ad 3) that the cause of sin is some apparent good as motive, yet lacking the due motive, viz. the rule of reason or the Divine law, this motive which is an apparent good, appertains to the apprehension of the senses and to the appet.i.te; while the lack of the due rule appertains to the reason, whose nature it is to consider this rule; and the completeness of the voluntary sinful act appertains to the will, so that the act of the will, given the conditions we have just mentioned, is already a sin.

Reply Obj. 1: That which is within a thing as its natural power, is always in it: but that which is within it, as the internal act of the appet.i.tive or apprehensive power, is not always in it. Now the power of the will is the potential cause of sin, but is made actual by the preceding movements, both of the sensitive part, in the first place, and afterwards, of the reason. For it is because a thing is proposed as appetible to the senses, and because the appet.i.te is inclined, that the reason sometimes fails to consider the due rule, so that the will produces the act of sin. Since therefore the movements that precede it are not always actual, neither is man always actually sinning.