Verses 1-5: The Reported Sin and Paul's Judgment. Paul addresses the report of incestuous fornication, condemns the church's arrogance, and declares his judgment to deliver the offender to Satan for the destruction of the flesh, aiming for ultimate salvation of the spirit.
Verses 6-8: The Leaven Metaphor and Call to Purity. Paul warns that boasting is harmful as a little sin affects the whole church, urging the removal of the 'old leaven' to become a new, pure community, celebrating Christ as the Passover sacrifice.
Verses 9-13: Instructions on Association and Church Discipline. Paul clarifies his previous instructions about not associating with immoral people, specifying that believers who persist in sin must be disciplined by exclusion from fellowship, emphasizing the church’s responsibility to judge insiders while God judges outsiders.