因果视角是解开宇宙之谜的关键。

世界需要更多像工程师一样思考的科学家，以及更多像科学家一样思考的工程师。

The most necessary, the most important, the principal, the most essential thing for a musician is this: to know what he wants, what he can do, and what he ought to do.

类比城市是一个类似于另一个城市的城市。