19. Your obedience, (481) etc. This is said to anticipate an objection; for he shows that he did not warn them, as though he thought unfavorably of them, but because a fall in their case was such as might have easily happened; as if he had said, — “Your obedience is indeed commended everywhere, and for this reason I rejoice on your account: yet since it often happens, that a fall occurs through simplicity, I would have you to be harmless and simple as to the doing of evil; but in doing good, to be most prudent, whenever it may be necessary, so that you may preserve your integrity.”
We here see what that simplicity is which is commended in Christians; so that they have no reason to claim this distinction, who at this day count as a high virtue their stupid ignorance of the word of God. For though he approves in the Romans, that they were obedient and teachable, yet he would have them to exercise wisdom and judgment, lest their readiness to believe exposed them to impositions. So then he congratulates them, because they were free from a wicked disposition; he yet wished them to be wise, so as to exercise caution. (482)
(481) This he calls “faith” in Romans 1:8 : so that obedience to the gospel is faith in what it declares. To believe is the special command of the gospel: hence to believe is the special act of obedience that is required; and he who believes is he who shall be saved. But this faith is that of the heart, and not of the lips; and a faith which works by love and overcomes the world, the mighty power of which we learn from Hebrews 11. — Ed.
(482) “Good” and “evil” in this clause, is beneficence and mischief. To be wise as to good, is to be wise in acts of kindness, in promoting good, as [ Beza ] seems to take it; and to be harmless or guileless, or simple as to evil, is to exercise no arts, by plausible speeches and flatteries, as was done by those referred to in Romans 16:17, in order to do mischief, to create divisions. The Apostle’s object throughout seems to have been to produce unanimity between the Jews and Gentiles. Hence in the next verse he speaks of God as “the God of peace,” the author of peace among his people; and he says that this God of peace would soon tread down Satan, the author of discord, the promoter of divisions and offenses; or, as most consider the passage, he prays that God would do this; for the future, after the manner of the Hebrew, is sometimes used by the Apostle as an optative. And indeed the verb is found in some copies in this mood ( συντρίψαι) and in the Syriac, Ethiopic, and Vulgate versions. — Ed.