Literature is the best weapon against intolerance and fanaticism.

Money is concerned only with what is common to all: it asks for the exchange value, it reduces all quality and individuality to the question: How much?

数学中最深刻的定理往往有最简单的表述。

不登上高山，就不知道天是多么高远；不亲临深溪，就不知道地是多么深厚。