What does the Bible say about the source of the gospel?

According to Galatians 1:11-12, Paul asserts that the gospel he preached is not according to man, nor did he receive it from any human being. Instead, he emphasizes that he received it through a revelation of Jesus Christ, highlighting the divine source of the gospel. This distinction is crucial because it underscores the authority of the gospel that believers are to adhere to. Paul’s experience serves as a vital reminder that the true message of salvation comes from God and is not subject to human alteration or interpretation. As Paul further illustrates through his testimony, it was God's grace that set him apart and called him to preach the gospel, underscoring the sovereignty of God in the salvation process.