Contradiction with Isaiah 64:6
While 2 Corinthians 7:14 speaks of boasting in others and being unashamed, Isaiah 64:6 emphasizes that our righteous acts are like filthy rags, suggesting that there is nothing to boast about.
Isaiah 64:6: But we are all as an unclean [thing], and all our righteousnesses [are] as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.
Contradiction with Proverbs 27:2
Instead of boasting as in 2 Corinthians 7:14, Proverbs 27:2 advises letting another person praise you, not your own mouth, implying that boasting may not be wise.
Proverbs 27:2: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
Contradiction with Galatians 6:14
Paul in 2 Corinthians 7:14 talks about boasting in others, whereas Galatians 6:14 states that we should only boast in the cross of our Lord Jesus Christ, suggesting a different focus for boasting.
Galatians 6:14: But God forbid that I should glory, save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world. [by whom: or, whereby]
Contradiction with James 4:16
2 Corinthians 7:14 highlights a positive boast, but James 4:16 warns against boasting, calling it evil and making it contradictory.
James 4:16: But now ye rejoice in your boastings: all such rejoicing is evil.