Romans 7:13
Was then that which is good made death unto me? God forbid. But sin, that it might appear sin, working death in me by that which is good; that sin by the commandment might become exceeding sinful.
Paul then considered still another possible misunderstanding in his effort to clarify the relationship of sin and the Law. Taking the last-mentioned quality of the commandment (“good”), he asked, Did that which is good, then, become death to me? Once again his immediate response was a vehement denial (By no means! me genoito; cf. comments on 3:4), followed by an explanation. The principle of sin, not the Law, becomes death to an individual (5:12). But sin uses the commandment, the good thing, as an agent or instrument to keep on producing death in a person and thereby sin is seen as utterly (lit., “exceedingly”) sinful. The internal principle or nature of sin uses the specific commandments of the Law of God—in part and in the whole; a “holy, righteous, and good” thing in itself—to manifest its true nature as opposed to God and to demonstrate its power within individuals.
Excerpt from:
Walvoord, J. F., Zuck, R. B., & Dallas Theological Seminary. (1983-c1985). The Bible knowledge commentary : An Exposition of the Scriptures. Wheaton, IL: Victor Books.
Below are FB comments on the book of Romans (The Bible Knowledge Commentary):