Paul addressed his followers in letters to the churches of Corinth and Galatia. He taught Christians how to treat each other. He also discussed immorality, salvation, and the correct way to worship. One of the major debates within the church was that Jews believed that everyone must adopt Jewish law and customs to become Christians. Even church leaders couldn't agree. Paul reminds his followers in his letter to the Galatians: «With the sacrificial death of Jesus, God established a new covenant that freed humanity from the law. Instead of having to follow rules, you are guided by the Spirit... If you obey the Spirit, the Law of Moses will have no power over you” (Acts 5,16-18). Paul also defends the commandment received from God to "proclaim his word to the Gentiles" (Acts 1:16). These principles are fundamental