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

Ignoring isn’t the same as ignorance, you have to work at it.

Science is not only a discipline of reason but also one of romance and passion.

当一个孩子问出一连串的「为什么」的时候，最聪明的回复就是「我不知道，你是怎么想的呢？」

我们不与任何人竞争，只与自己竞争，做到最好。