The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。
Algebraic geometry is the study of zeros of polynomials.
The human being is a most curious creature. He thinks he has got one soul, and he has got dozens.
"In observational studies, we often have to rely on assumptions that are not directly testable."
物理学的目的不是描述自然，而是理解自然。
故事是作者写给自己的信，用来告诉自己那些无法以其他方式发现的事情。
心灵最深切关注的一切，只能经由嘴唇吐出的言词讨论。