Contradiction with Proverbs 3:5
Proverbs 8:14 emphasizes having one's own counsel and strength, whereas Proverbs 3:5 advises not to rely on one's own understanding.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Jeremiah 9:23
Proverbs 8:14 speaks of counsel and sound wisdom, while Jeremiah 9:23 warns against boasting in wisdom or might.
Jeremiah 9:23: Thus saith the LORD, Let not the wise [man] glory in his wisdom, neither let the mighty [man] glory in his might, let not the rich [man] glory in his riches:
Contradiction with Ecclesiastes 7:23-24
Proverbs 8:14 claims possession of counsel and understanding, but Ecclesiastes 7:23-24 reflects on the elusiveness and difficulty of fully grasping wisdom.
Ecclesiastes 7:23-24: All this have I proved by wisdom: I said, I will be wise; but it [was] far from me.
Contradiction with 1 Corinthians 3:19
Proverbs 8:14 attributes true wisdom and strength, but 1 Corinthians 3:19 refers to worldly wisdom as foolishness with God.
1 Corinthians 3:19: For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.
Contradiction with Isaiah 47:10
Proverbs 8:14 speaks of personal sound wisdom and strength, whereas Isaiah 47:10 criticizes overconfidence in one's own wisdom and knowledge.
Isaiah 47:10: For thou hast trusted in thy wickedness: thou hast said, None seeth me. Thy wisdom and thy knowledge, it hath perverted thee; and thou hast said in thine heart, I [am], and none else beside me. [perverted...: or, caused thee to turn away]