如果你感觉自己在走过地狱。走着别停。

There is no such thing as a moral or an immoral book. Books are well written, or badly written. That is all.

The most important skill in mathematics is the ability to ask the right questions.

生命短暂，但如果我们活得正确，一次就足够了。

"El amor es una fuerza que nos impulsa a seguir adelante, a pesar de todo."