化学不仅是一门科学，它是一种看待世界的方式。
The saying that a little knowledge is a dangerous thing is, to my mind, a very dangerous adage.
The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.
保持健康，不要失去勇气。
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.