What man took from God by his sin, which he has no power to repay.
Anselm. What did man take from God, when he allowed himself to be overcome by the devil?
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Boso. Go on to mention, as you have begun, the evil things which can be added to those already shown for I am ignorant of them.
Anselm. Did not man take from God whatever He had purposed to do for human nature?
Boso. There is no denying that.
Anselm. Listen to the voice of strict justice; and judge according to that whether man makes to God a real satisfaction for his sin, unless, by overcoming the devil, man restore to God what he took from God in allowing himself to be conquered by the devil; so that, as by this conquest over man the devil took what belonged to God, and God was the loser, so in man’s victory the devil may be despoiled, and God recover his right.
Boso. Surely nothing can be more exactly or justly conceived.
Anselm. Think you that supreme justice can violate this justice?
Boso. I dare not think it.
Anselm. Therefore man cannot and ought not by any means to receive from God what God designed to give him, unless he return to God everything which he took from him; so that, as by man God suffered loss, by man, also, He might recover His loss. But this cannot be effected except in this way: that, as in the fall of man all human nature was corrupted, and, as it were, tainted with sin, and God will not choose one of such a race to fill up the number in his heavenly kingdom; so, by man’s victory, as many men may be justified from sin as are needed to complete the number which man was made to fill. But a sinful man can by no means do this, for a sinner cannot justify a sinner.
233
Boso. There is nothing more just or necessary; but, from all these things, the compassion of God and the hope of man seems to fail, as far as regards that happiness for which man was made.
Anselm. Yet wait a little.
Boso. Have you anything further?
Source: Cur Deus Homo (CCEL)