Daily Tehillim - Psalms

There are seven things that characterize a boor, and seven things that characterize a wise man. A wise man does not speak before one who is greater than himself in wisdom or age. He does not interrupt his fellow's words. He does not hasten to answer. His questions are on the subject and his answers to the point. He responds to first things first and to latter things later. Concerning what he did not hear, he says "I did not hear." He concedes to the truth. With the boor, the reverse of all these is the case.

  –Ethics of the Fathers, 5:7