"The moment you doubt whether you can fly, you cease for ever to be able to do it."

你只活一次，但如果你做得对，一次就足够了。

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。

The most important political development of the last two centuries has been the rise of the modern state.

The target is to be the best, not to beat someone else.

The heart is a fragile thing, easily broken but hard to mend.

You can't change your elephant by direct force, but you can train it over time.

你国家睡不着觉是因为我。