La verdadera patria del hombre es su infancia.
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
写作不正是一种翱翔,一种可以做到的飞翔的、梦幻的、想象的形式吗?
最大的力量不在于控制他人,而在于理解他们。
Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.