历史学家是向后看的先知。
The question is not whether the thing exists, but whether it has any essence which is capable of existence without us.
我不认为你应该花很多时间为坏运气而不开心。你会遇到很多,但你也会遇到很多好的。要做的事情就是尽量增加利用好运的几率,尽量减少坏运的影响。
A mathematical proof is a poem written in the language of logic.
心灵是一个时间上的过程序列。