For when we were in the flesh - in our unregenerate state, as we came into the world. See on Joh 3:6 and see on Rom 8:5-9.
the motions - “passions” (Margin), “affections” (as in Gal 5:24), or “stirrings.”
of sins - that is, “prompting to the commission of sins.”
which were by the law - by occasion of the law, which fretted, irritated our inward corruption by its prohibitions. See on Rom 7:7-9.
did work in our members - the members of the body, as the instruments by which these inward stirrings find vent in action, and become facts of the life. See on Rom 6:6.
to bring forth fruit unto death - death in the sense of Rom 6:21. Thus hopeless is all holy fruit before union to Christ.