"Do not be joyful almong the mourners!" ~~ Mishle Agur
"If a guest enters your home, ask him no quesitons of the Torah unless you know that he can answer! " ~~ Sefer Chassidim
"A man should not drink from a glass and then give it to another." ~~ Derekh Eretz R.
"Be first in greeting every man!" ~~ Avot 4:15
"Do not interrupt while another speaks." ~~ Simeon b. Yohai
"The world is governed not by morality, but by a hardened form of it, manners." ~~ Berthold Auerbach
"Fine manners are the oil that lubricates social contacts…Ability is adorned by nothing as much as by affability." ~~ Rabbi Leon Harrison
"One must behave before men as one must before God." ~~ Sheqalim
"Whatever your host tells you, do. " ~~ Talmud, Pesachim
"Be ever decorous when you enter and when you leave. " ~~ Talmud, Pirke Ben Azzai
"Greet all men with a smiling face!" ~~ Avot 1:15,16
"Beware of discourtesy to the poor: The Lord stands near them." ~~ The Slonimer Rabbi