What immorality problem did Paul address in 1 Corinthians 5?
In 1 Corinthians 5, Paul addressed gross immorality within the church. A believer had stooped to a low level of immorality, and the congregation was not addressing it. This grieved the apostle, so he dealt with the matter in his first letter.
Les explains that among the problems in the Corinthian correspondence, 1 Corinthians 5 involved gross immorality. It was a grief to the apostle to think that a believer would stoop to such a low level, and the church wasn't addressing it. Les notes this was dealt with in the first letter. Later, when Paul writes 2 Corinthians, he seems to give the idea that many of these things were now corrected, indicating his first letter did not fall on deaf ears.
More Questions
Was there opposition in the Corinthian church to disciplining the immoral man?
There was a minority in the church who opposed the discipline, like liberals today who say to leave the man alone because people are people.
How is the sin in 1 John 5 not unto death different from the sin in 1 Corinthians?
The sins John describes as not unto death are not as gross as the sin Paul deals with in Corinthians, though it is still sin in the church.
Which chapter of 1 Corinthians is Paul referring to in 2 Corinthians when he mentions the wrongdoer?
The individual Paul refers to in 2 Corinthians is the man of 1 Corinthians 5, the chapter Paul deals with most, since Paul uses the pronoun 'his,' showing he means one man, an individual.