出自春秋·鲁·孔子《论语》。孔子杜绝了四种弊病，不妄意，不妄下决断，不固执，不以自我为中心。

"I have always liked the phrase 'nursing a grudge,' because many people are tender of their resentments, as of the thing nearest their hearts."

Mathematics is the key to unlocking the secrets of the universe and understanding the fundamental laws that govern it.

Strength does not come from winning. When you go through hardships and decide not to surrender, that is strength.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

想象力是人类最自由的领地。