世界不是辩证的——它誓死走向极端，而不是平衡，誓死走向激进的对抗，而不是和解或综合。

我一直被一种声音所吸引，它既绝对权威，又绝对谦卑。

The most profound ideas in mathematics often arise from the simplest observations.

Children have never been very good at listening to their elders, but they have never failed to imitate them.

粒子的概念只是近似的，并且只有在动量较小的极限下才有意义。