数学不是一门演绎科学——那是陈词滥调。当你试图证明一个定理时，你不仅仅是列出假设然后开始推理。你所做的是反复试验、实验和猜测。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
宇宙是全息图的想法与我们日常经验截然不同。
过去是一个异国，那里的人们做事方式不同。
家庭是一个生产人力资本的小工厂。
The only way to do great work is to love what you do.