生物为生存而进行的普遍斗争，不是为了原材料，也不是为了能量——能量以热的形式大量存在于每个物体中（可惜无法转化）；而是为了熵，它通过能量从炽热的太阳转移到寒冷的地球而变得可用。

读书的人死前活过千次，不读书的人只活一次。

Thank God, under our Constitution there was no connection between church and state.

唯一的失败就是不去尝试。

A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.

Investors should focus on asset allocation rather than market timing.