How do we know that Paul’s teachings are true?

The validity of Paul's teachings can be seen through his solemn warnings against legalism and antinomianism found in his letters, particularly in Philippians and Galatians. He emphasizes that believers are not under the law but are called to live in the liberty that Christ has provided. Paul's heartbreak over those who oppose the cross further illustrates his sincerity and the depth of his commitment to the truth of the gospel. His life and ministry, characterized by suffering and devoted service to Christ, serve as powerful evidence of the authenticity of his message.