"Some men are stupid: they stand up to honor a Holy Scroll, but do not rise to honor a sage." ~~ Talmud Makkot 22b
"Who guards his mouth preserves his life." ~~ Proverbs (Mishle) 13:3
"If a great man said it, do not laugh at it!" ~~ Talmud, Berakhot
"Good manners mean more than learning." ~~ Tanna Deve Eliyahu R.
"Who respects the elderly is as if he respects the Lord." ~~ Alphabet of Ben Sira
"Who wishes to be friendly with people should cling to good manners." ~~ Ben Gabirol
"A man without grace is as a tale out of season." ~~ Ben Sira 20:14
"Do not dishonor the old: we shall all be numbered among them." ~~ Ben Sira
"All men should rise when a sage passes." ~~ Talmud, Kiddushin 33a
"You shall rise before the aged and show deference to the old." ~~ Leviticus (Vayikra) 19:32
"Your elder brother should be respected like your father." ~~ Yemenite Proverb
"Teach a child good manners during babyhood." ~~ Nachman of Bratslav