"Sometimes, the hardest part of life is not the suffering, but the waiting."

Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

La literatura no es otra cosa que un sueño dirigido.

史记

I’m not a pessimist. I’m an optimist trained in pessimism.

在数学中，你不理解事物。你只是习惯了它们。