How do we know the authority of Christ's message?

The authority of Christ's message is emphasized in Galatians 1:1, where Paul declares he is an apostle, not sent by man but by Jesus Christ and God the Father. This distinction is critical because it affirms that the gospel does not originate from human wisdom or tradition, but directly from divine revelation. Paul's encounter with the risen Christ and his subsequent commissioning underscore this authority. With the certainty of firsthand experience, Paul asserts that what he preaches is the genuine declaration of God’s truth, which is essential for believers to recognize and adhere to.