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。
No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.