Learning is essentially a matter of stimulus-response connections.
The only way to discover the limits of the possible is to go beyond them into the impossible.
最好的故事会为读者的想象力留下跳舞的空间。
You are only as young as the last time you changed your mind.
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。