If you don’t learn etiquette, you can’t stand up. ——Confucius

The most appetizing thing at a banquet is the etiquette of the host. ——Shakespeare

Discourteousness is the bastard child of ignorance. ——Butler

We should be careful not to hurt other comrades with words, but we should also be able to bear it when others use words to hurt us. ——Liu Shaoqi

Courtesy is the golden key to human perfection. —— Sonsuneji

Speaking aggressively does not necessarily make sense. ——Sadie

Courtesy is the first thing that children and young people should take special care to cultivate into their habits. —— John Locke

Courtesy pleases those who are polite and those who are treated with courtesy. ——Montesquieu

Courtesy can often replace the noblest feelings. ——Mérimée

Courtesy is the easiest thing to do and the most precious thing. —— Gonchar

Perfect etiquette can calm people down (Jouber)