最可怕的时刻总是在你开始之前。

翻译：既了解敌人，又了解自己，每次作战都不会有危险。

美洲的历史是如此超乎寻常的现实，以至于看起来像是虚构的。

The stream of thought is the stream of life solving its problems.

The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

The mathematics of spin glasses revealed a hidden structure that applies to many seemingly unrelated problems.

数学不是关于数字、方程、计算或算法：它是关于理解的。