Thomas Aquinas, on Rom 6:15

“What then? Shall we sin, because we are not under the law, but under grace? God forbid.”

“Then when he says, what then, he raises a question against what he has said. And concerning this he does three things: first, he raises the question; second, he answers it, at God forbid! Know you not; third, he shows how unfitting it would be to misinterpret his statement, at but thanks be to God. In regard to the first it should be noted that his statement could be falsely interpreted, namely, that Christ's faithful are not under the law with respect to being obliged to obey its moral precepts. For it would follow that Christ's faithful could lawfully commit sin and act against the moral precepts. Therefore, in this context he raises the question: what then? Shall we sin, i.e., shall we act against the moral precepts, because, as has been said, we are not under the law, but under grace? This interpretation the Apostle rejects in Galatians: for you were called to freedom, brethren, only do not use your freedom as an opportunity for the flesh (Gal 5:13).”

Imported from an open dataset — not yet checked against the printed edition.