有时候，最深的痛苦来自于我们无法表达的情感。
Sometimes, the deepest pain comes from emotions we cannot express.
Our experience tends to confirm a long-held notion that being prepared, on a few occasions in a lifetime, to act promptly in scale, in doing some simple and logical thing, will often dramatically improve the financial results of that lifetime.
我们生活在阴沟里，但依然有人仰望星空。
The beauty of mathematics only shows itself to more patient followers.
Freedom is never voluntarily given by the oppressor； it must be demanded by the oppressed.
我并不完美。我和其他人一样会犯错。
What we see is not simply given but actively constructed through complex processes.
"Ein Buch zu schreiben ist wie eine Reise in ein unbekanntes Land."