There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.

Respect your efforts, respect yourself. Self-respect leads to self-discipline. When you have both firmly under your belt, that's real power.

心中没有成见则处事公平，心中没有自我则光明正大。

数学的快乐来自创造的行为，而不仅仅是结果。