I.  1 Cor 5:1-5 Paul breaks it down

5 It is actually reported that there is sexual immorality among you, and of a kind that even pagans do not tolerate: A man is sleeping with his father’s wife. ² And you are proud! Shouldn’t you rather have gone into mourning and have put out of your fellowship the man who has been doing this? ³ For my part, even though I am not physically present, I am with you in spirit. As one who is present with you in this way, I have already passed judgment in the name of our Lord Jesus on the one who has been doing this. ⁴ So when you are assembled and I am with you in spirit, and the power of our Lord Jesus is present, ⁵ hand this man over to Satan for the destruction of the flesh,^[a][b] so that his spirit may be saved on the day of the Lord.  

1. The Issue
2. How to address it
3. What the hope is

 II.  1 Cor 5:6-8 The problem with the Corinthian church’s existing approach

⁶ Your boasting is not good. Don’t you know that a little yeast leavens the whole batch of dough? ⁷ Get rid of the old yeast, so that you may be a new unleavened batch—as you really are. For Christ, our Passover lamb, has been sacrificed. ⁸ Therefore let us keep the Festival, not with the old bread leavened with malice and wickedness, but with the unleavened bread of sincerity and truth.

1. Why should they change?
2. What should they embrace?
3. A point to ponder for all of us.

III.  1 Cor 5:9-13   The focus of discipline

⁹ I wrote to you in my letter not to associate with sexually immoral people— ¹⁰ not at all meaning the people of this world who are immoral, or the greedy and swindlers, or idolaters. In that case you would have to leave this world. ¹¹ But now I am writing to you that you must not associate with anyone who claims to be a brother or sister^[c] but is sexually immoral or greedy, an idolater or slanderer, a drunkard or swindler. Do not even eat with such people.

¹² What business is it of mine to judge those outside the church? Are you not to judge those inside? ¹³ God will judge those outside. “Expel the wicked person from among you.”^[d]

1. A matter of practicality
2. A matter of jurisdiction
3. Conclusions

Footnotes

1. 5:5In contexts like this, the Greek word for flesh (sarx) refers to the sinful state of human beings, often presented as a power in opposition to the Spirit.
2. 5:5Or of his body
3. 5:11The Greek word for brother or sister (adelphos) refers here to a believer, whether man or woman, as part of God’s family; also in 8:11, 13.
4. 5:13Deut. 13:5; 17:7; 19:19; 21:21; 22:21,24; 24:7