"The truth is rarely pure and never simple."

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

The mind is a constantly evolving stream of experiences.

我们不是从祖先那里继承皮革，而是从子孙那里借来的。

希望是脆弱的，但它也是我们拥有的最强大的力量。