Ecclesiastes 7:19-22 - Wisdom Is Valuable, But No One Is Completely Righteous
19 Wisdom is a strength to the wise man more than ten rulers who are in a city. 20 Surely there is not a righteous man on earth, who does good and doesn't sin.
21 Also don't take heed to all words that are spoken, lest you hear your servant curse you; 22 for often your own heart knows that you yourself have likewise cursed others.