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。
预测未来的最好方法就是创造未来。
"I am not interested in the psychology of characters, but in the psychology of situations."
Make it a rule never to give a child a book you would not read yourself.