“Courteous people learn courtesy from the discourteous”

“Courteous men learn courtesy from the discourteous.”

“Tzu Chang asked Confucius about jen. Confucius said, "If you can practice these five things with all the people, you can be called jen."Tzu Chang asked what they were.Confucius said, "Courtesy, generosity, honesty, persistence, and kindness.If you are courteous, you will not be disrespected; if you are generous, you will gain everything. If you are honest, people will rely on you. If you are persistent you will get results. If you are kind, you can employ people.”

“ 'Yes, we rather condemn people for eternity without the courtesy of informing them.' ”

“Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing.”

“Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.”