孩子是最苛刻的观众，但也是最值得的。

The old-fashioned dictator does not exist under scientific management. The man at the head of the business under scientific management is governed by rules and laws which have been developed through hundreds of experiments just as much as the workman is.

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

I'm not afraid of dying, I just don't want to be there when it happens.

I don't think about music in terms of competition. I just try to make the best music I can.

Power is not a tool, it is a weapon. And like any weapon, it can be used for good or ill.

The only safe thing is to take a chance.

每一个字都是踏入未知的一步。