Proverbs 22:15 and the Disciplining of a Child
Folly is bound up in the heart of a child, but the rod of discipline drives it far from him.
Some people like to say that children are born pure and innocent and that prejudice and violence must be taught. We know from experience, common sense, and Scripture that this is a utopian pipe dream. We are all born at war with our own evil inclinations and righteous behavior must be taught through wise discipline and repetition.
From Jay Carper at http://www.AmericanTorah.com.