"I am not defined by my past. I am driven by my future."

The secret of change is to focus all of your energy, not on fighting the old, but on building the new.

理论上，理论和实践之间没有区别。但实际上，是有区别的。

The human mind is so complex and things are so tangled up with each other that, to explain a blade of grass, one would have to make a diagram of the universe.