Contradiction with Proverbs 27:2
This verse advises letting others praise you, not yourself, which contrasts with being on the verge of boasting as Paul mentions.
Proverbs 27:2: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
Contradiction with Matthew 5:5
This verse highlights the virtue of meekness, which seems to oppose boasting or speaking highly of oneself.
Matthew 5:5: Blessed [are] the meek: for they shall inherit the earth.
Contradiction with Galatians 6:14
This verse supports boasting only in the cross of Jesus Christ, contrasting with boasting about personal experiences.
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 1 Corinthians 1:31
Paul encourages boasting in the Lord, which contradicts any notion of boasting about oneself.
1 Corinthians 1:31: That, according as it is written, He that glorieth, let him glory in the Lord.