And just as he that wishes to punish someone by fumigating with a foul smell, sulfur and dung, does not put a foul smell into the sulfur and dung (it already is there), so God, when He punishes sins through the devil and the vessels of wrath with sins, does not put any sin into them, but it is there naturally since the fall in the devil and in men (Eph. 4; Rom. 1).

Yes, there is even in ourselves sin and corruption enough, so that there is no need that God should infuse into us either a new or greater measure of wickedness. Therefore, when God is said in the Scripture to harden (Ex. 7:13), to blind (John 12:40) and to deliver us up into a reprobate sense (Rom. 1:28), it is to be understood that God does it by just judgment, as a just judge and avenger.

Of the author of sin, we confess that our Lord God, though He is the creator and sustainer of all creatures, yet He is not the author of sin. It is rather the evil will, both in the Devil and in the godless human, that, when he does not obtain help from the Lord God, turns away from God, as Christ speaks in John 8, “When the Devil speaks a lie, he speaks of his own, for he is a liar and the father of lies” (v. 44).

Yet we deny that He is the author of sin, or that the blame of things done amiss can be laid upon Him, seeing His will is the sovereign and infallible rule of all righteousness and equity: but this we confess that He has those admirable means as whereby He makes the devils and the ungodly, as His instruments to serve Him and to turn the evil which they do and whereof they are guilty into good.

For besides the fact that God, who is supremely good, can make nothing except what is good, if man had been brought forth depraved and evil, God could have had no sufficiently just cause for punishing that wickedness of which he himself would have been the creator and author.