Seven things are in a boorish man and seven in a wise man:
1. A wise man does not speak
in the presence of one who is greater than he in wisdom;
2. he does not interrupt the words of his associates;
3. and he does not hasten to reply;
4. A wise man questions according to the subject, and answers accordingly to rule;
5. He speaks of the first thing first, and the last thing last;
6. Concerning what he has not heard, he says "I have not heard";
7. and he acknowledges the truth.
The opposites of these are found in the boorish man.
Ethics of the Fathers (Pirkei Avot) 5:10
English: The Ethics of the Talmud: Sayings of the Fathers
Edited with introduction, translation and commentary
by R. Travers Herford
( Schocken Books, NY, 1962)