The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.

History is not just the story of bad people doing bad things. It's also the story of good people doing nothing.

The only way of discovering the limits of the possible is to venture a little way past them into the impossible.

Every tree planted today is a legacy for future generations.

The only thing that’s keeping you from getting what you want is the story you keep telling yourself.

真理从不畏惧辩论。

The only way to do great work is to love what you do.

所有模型都是错误的，但有些是有用的。