What does the Bible say about confidence in men?

In Proverbs 25:19, Solomon compares reliance on an unfaithful person during times of trouble to the pain of a broken tooth or a foot out of joint. This powerful imagery illustrates the deep disappointment and agony that comes from placing trust in someone who ultimately cannot provide true help or security. Just as a broken tooth inflicts sharp pain, having confidence in someone who cannot deliver on promises, especially concerning eternal matters, results in profound spiritual and emotional suffering.