Paul wrote 1 Corinthians. Paul was from the city of Tarsus. He had been known as Saul in his early life. Before becoming a Christian, Paul was a Pharisee. He persecuted Christians. After he became a Christian, he traveled several times throughout the Roman Empire telling people about Jesus.
1 Corinthians is a letter that Paul wrote to the believers who were in the city of Corinth. Paul had heard that there were problems among the believers there. They were arguing with each other. Some of them did not understand some of the Christian teachings. And some of them were behaving badly. In this letter, Paul responded to them and encouraged them to live in a way that pleased God.