What does the Bible say about the authority of the apostle Paul?

The authority of Paul as an apostle is established in his direct commission from Jesus Christ. In Romans 1:1, Paul introduces himself as a servant and an apostle, indicating that his writings carry the weight of divine authority. This authority is not self-appointed but is rooted in the explicit call of Christ, who, as seen in Matthew 28:18-20, commanded his apostles to go and teach all nations. Therefore, when we engage with the texts of Romans and other Pauline epistles, we are receiving the words of someone appointed by Christ Himself. Indeed, Paul emphatically states in Galatians 1:11-12 that the gospel he preaches was not received from any man, but through a revelation of Jesus Christ, solidifying his status as an authoritative voice for the Christian church.