世界会打击每一个人，但经历过后，许多人会在受伤的地方变得更坚强。

Mathematics is the key and door to the sciences.

Money and power don't change you, they reveal you.

The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.

我们越是了解非人类动物的真实本性，尤其是那些拥有复杂大脑和相应复杂社会行为的动物，就越会对它们在为人类服务中的使用产生伦理上的担忧——无论是在娱乐、作为“宠物”、用于食物、在实验室中，还是我们施加给它们的任何其他用途。

The only thing that matters is how you feel about yourself.

"The only thing that is truly infinite is the human soul."

生下来就知道的人是上等，经过学习才知道的人是次一等，遇到困惑才学习的人是又次一等，有了困惑而不学习的，这是最下等的人。

It is now clear that the hybrids form seeds which have the one or the other of the two differentiating characters.