To think twice is quite enough.

There are three marks of a superior man: being virtuous, he is free from anxiety; being wise, he is free from perplexity; being brave, he is free from fear.

Shall I tell you what knowledge is? It is to know both what one knows and what one does not know.

Even four harnessed horses cannot bring imprudent words back into the mouth.

Gentlemen cherish worth; the vulgar cherish dirt. Gentlemen trust in justice; the vulgar trust in favor.

Just as lavishness leads easily to presumption, so does frugality to meanness. But meanness is a far less serious fault than presumption.

The superior person gathers his weapons together in order to provide against the unforeseen.