Contradiction with James 1:22
While Acts 20:18 highlights actions, James 1:22 emphasizes not just hearing, but also doing the word.
James 1:22: But be ye doers of the word, and not hearers only, deceiving your own selves.
Contradiction with Matthew 6:1
Acts 20:18 speaks to Paul's consistent service, while Matthew 6:1 warns against doing righteous acts to be seen by others.
Matthew 6:1: Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven. [alms: or, righteousness] [of your: or, with your]
Contradiction with Matthew 5:16
Acts 20:18 highlights Paul's humility, but Matthew 5:16 encourages good works to be visible to others.
Matthew 5:16: Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.
Contradiction with Galatians 1:10
Acts 20:18 demonstrates Paul's consistent service to God, whereas Galatians 1:10 warns against seeking to please men.
Galatians 1:10: 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.
Contradiction with 1 Samuel 16:7
Acts 20:18 focuses on outward actions, while 1 Samuel 16:7 teaches that God looks at the heart rather than outward appearance.
1 Samuel 16:7: But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for [the LORD seeth] not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart. [outward...: Heb. eyes]