The first issue Paul brings up to the church at Corinth is their division. One thing we understand from what he says is these people are playing favorites. Someone shared the gospel with them and they were baptized by that certain person. Paul even shares some of their names! However, Paul tells them they are focused on the wrong person and their division isn’t necessary. They are to be focusing on Jessus, the one who died on the cross and saved them from their sins. He is the most important person and the others are not important at all.