Ecclesiastes 7:19-24

Wisdom is a strength to the wise man more than ten rulers that are in a city. Surely there is not a righteous man upon earth, that doeth good, and sinneth not. Also take not heed unto all words that are spoken, lest thou hear thy servant curse thee; for oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others. All this have I proved in wisdom: I said, I will be wise; but it was far from me. That which is, is far off and exceeding deep; who can find it out?