1Cor 6:12-14
"All things are lawful for me," but not all things are helpful. "The body is not meant for sexual immorality, but for the Lord, and the Lord for the body. And God raised the Lord and will also raise us up by his power."
Paul cites two Corinthian slogans: 'All things are lawful for me' and 'Food is for the stomach' — and corrects them. The body is not morally neutral — it belongs to the Lord and will be resurrected. Bodily resurrection grounds sexual ethics.
1Cor 6:19-20
"Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God? You are not your own, for you were bought with a price. So glorify God in your body."
The final argument: the believer’s body is naos tou hagiou pneumatos — temple of the Holy Spirit. Desecration of the temple is desecration of the Spirit. 'You were bought with a price' — redemption implies belonging. Sexual holiness is not legalism — it is worship.