What does 2 Corinthians 2:4 mean?
Many Bible scholars believe that what's described here is a now-lost letter of Paul. This would have been sent between what we now know as 1 Corinthians and 2 Corinthians. Some suggest the mystery letter was actually written prior to 1 Corinthians, but that's not as clean a fit with the context of those two letters.Instead, the sequence seems to be that Paul visited the Corinthians briefly following the writing of 1 Corinthians. During that painful visit, a confrontation took place. This appears to have been with a church member challenging Paul's authority as an apostle. It is unclear if most in the church sided with Paul or with this other man. Paul wrote the now-lost letter to them in order to urge the church to deal with this man and make clear their support for Paul's authority as an apostle of Jesus.
Writing that letter, Paul now says, caused him great pain. He wrote it out of affliction and anguish of heart, shedding tears as he sent it. He did not write it in order to cause them pain. That's the last thing Paul wanted for them. Instead, he wrote it because he loved them so deeply. He knew that hearing the truth might hurt them, but he also hoped it would bring healing to everyone involved. Apparently, that's exactly what has happened.
Second Corinthians 2:1–4 finds Paul explaining with great emotion how he decided not to return to Corinth until he learned whether they would side with or against him. He did not want to cause mutual needless pain with another difficult visit. Instead, he wrote to them in great anguish. That letter—now lost—told them to correct the man and to remain loyal to God's authority in and through him. He did not write to hurt them but out of abundant love for them.
Paul explains why he delayed coming to visit the Corinthians. In great anguish, he had written a painful letter to tell them they must correct a man among them. This person may have challenged Paul's authority as an apostle of Jesus. The Corinthians disciplined the man, and he repented. Paul told them to forgive him. He tells of Titus failing to show up in Troas with news about the Corinthians, then transitions into teaching that Christians are the aroma of Christ on earth to everyone they know.