自信是关键。如果你不相信自己，别人也不会相信你。

能量守恒定律不仅仅是一个抽象原则；它是已被无数实验验证的自然法则。

Rebuilding my career at fifty wasn’t easy—but nothing worthwhile ever is.

"The past is a puzzle, and the historian is the person who tries to put the pieces together."

人类心灵是在并行硬件上运行的串行处理器。