Romans 7:24-25 — O wretched man that I am! who shall deliver me from the body of this death?
I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
body — physical body, the instrument of sin.
Paul doesn't ask "What shall I do?, but "Who shall deliver me?"
I thank God — Paul's answer to the question in verse 24. The Lord will deliver us when He returns and our bodies are redeemed.
law of God and law of sin — the stress is on the nature of each law.