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。

Great spirits have often encountered violent opposition from weaker minds.

People don’t want to remember pain; they want to remember love. But pain is also part of our history.

数学是理性的音乐。