Contradiction with Proverbs 27:2
This verse advises letting others praise you and not doing it yourself, potentially contradicting the endorsement of a brother who is praised in all churches in 2 Corinthians 8:18.
Proverbs 27:2: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
Contradiction with Matthew 6:1
This verse warns against practicing righteousness before others to be seen by them, which could be seen as contrasting the public praise mentioned in 2 Corinthians 8:18.
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 Galatians 1:10
This verse questions seeking human approval as potentially being against serving Christ, which contrasts with the approval mentioned in 2 Corinthians 8:18.
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 James 4:10
This verse encourages humility and waiting for the Lord's exaltation, which may contrast with a person being praised by many churches as in 2 Corinthians 8:18.
James 4:10: Humble yourselves in the sight of the Lord, and he shall lift you up.
Contradiction with 1 Corinthians 4:5
Advises waiting for the Lord to bring to light the motives of the heart, which can be seen as inconsistent with the immediate human praise in 2 Corinthians 8:18.
1 Corinthians 4:5: Therefore judge nothing before the time, until the Lord come, who both will bring to light the hidden things of darkness, and will make manifest the counsels of the hearts: and then shall every man have praise of God.