The word "persuade" in verse 10 means "to seek to please men". If I seek to please men then I cannot be a servant of God.
Galatians 1:10-12 KJV For do I now persuade men, or God? or do I seek to please men? for if I yet pleased men, I should not be the servant of Christ. (11) But I certify you, brethren, that the gospel which was preached of me is not after man. (12) For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ.