First four chapters of 1 Corinthians deal with the problem of dissention and arguments in the churc
Chapter five deals with scandal
Fundamental wrongs in the church: toleration of scandal (ch 5), divisions in the Lord's supper bringing the sacrament into disgrace.
Paul quotes Levitical law, which condemns incest
Jesus: not the minutest part of the law will pass away
We are dealing with an awesome and holy God - who sees us in Christ Jesus