化学的艺术在于分离、提纯和结合物质的能力。

We are interested in the ordinary. We are interested in how you can take something that is very common and make it special.

每一个词都是通向理解的一步，每一句话都是通向另一个灵魂的桥梁。

The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.

The best way to learn mathematics is to do mathematics.

To be happy, it is necessary to forget as well as to remember.

A person who is too nice an observer of the business of the crowd, like one who is too curious in observing the labor of bees, will often be stung for his curiosity.

哲学史不是思想的博物馆，而是批判性思维的生命传统。