自由是对必然性的认知。

The study of mathematics is like air or water to the development of science.

The brain caps off its second and last growth spurt in your 20s as it rewires itself for adulthood.

最重要的事是享受生活——快乐——这才是最重要的。

Whereof one cannot speak, thereof one must be silent.

计算复杂性的美在于它能够根据问题的固有难度对问题进行分类。