The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

Leaders are more powerful role models when they learn than when they teach.

纺织工业的未来在于可持续性和创新。

The mind is a system of interacting sensations.

在了解物理力、它们的规律及相互关系之后，接下来是它们起源的问题。

自由在于勇敢。