Romans 7:5-6 — For when we were in the flesh, the motions of sins, which were by the law, did work in our members to bring forth fruit unto death.
But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not in the oldness of the letter.
flesh = unregenerate state, united to the law
motions = impulses, passions, affections, emotions
by the law — The law produced desires to do things that it fobade.
members = parts of our bodies
delivered = discharged, to make ineffective
that being dead — Believers have died to the claims of the law.
newness of spirit — new life lived through the Spirit's power. Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life (2 Corinthians 3:6).
oldness of the letter — outward conformity to the law
Indeed, our relationship to the Law has been doubly dissolved; it has died to us and we have died to it. And now we can serve this blessed One who loved us and gave Himself for us (Galatians 2:20, Ephesians 5:25), not in the old, dry dead, "religious" way, because the Law says we must, but in fresh, joyous newness of spirit, our words and works expressing our gratitude and love. — C.R. Stam, The Epistle of Paul to the Romans, pg. 164.