Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

I needed a drink, I needed a lot of life insurance, I needed a vacation, I needed a home in the country. What I had was a coat, a hat and a gun.

在苦难时回忆幸福是最深的痛苦。

A verdadeira revolução é a que transforma o coração do homem.