Paul asks how any of them dares, when he has a matter against another, to go to law before the unrighteous instead of before the saints. He reminds them that the saints will judge the world and even angels, so they should be able to settle matters of this life. With irony he asks whether there is no one among them wise enough to judge between brothers. It is already a defeat that there are lawsuits among them: it would be better to be wronged or defrauded. But they themselves wrong and defraud, and their own brothers.
Paul reminds them that the unrighteous will not inherit the kingdom of God, and lists conduct such as sexual immorality, idolatry, adultery, theft, greed, drunkenness, reviling and swindling. Some of them were like that, but they were washed, sanctified and justified in the name of the Lord Jesus Christ and by the Spirit of our God.
He then cites what some were saying: all things are lawful for me. Paul answers that not everything is helpful and that he will not be mastered by anything. Food is for the stomach, but God will destroy both; the body is not for immorality but for the Lord, and God who raised the Lord will also raise us. Believers' bodies are members of Christ, and joining them to a prostitute makes one body with her. Whoever is joined to the Lord is one spirit with him. Paul commands them to flee sexual immorality, for the one who commits it sins against his own body. Your body is a temple of the Holy Spirit, who is in you and whom you have from God. You are not your own, for you were bought with a price. So glorify God in your body.