The more the division of labor and the application of machinery extend, the more does competition extend among the workers, the more do their wages shrink together.
读书贵在能有疑问，有疑问方能增进对事物的了解。
We are all exiles in one way or another.
数学不知道种族或地理界限；对于数学来说，文化世界是一个国家。
我唯一能依靠的是自己的感知，而它总是在变化。
Quality is not a fortune; it is a plan.