We are all in the gutter, but some of us are looking at the stars.
我们都在阴沟里，但仍有人仰望星空。
The details are not just details; they make the product.
The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.
数学是给不同事物起相同名称的艺术。
Live out of your imagination, not your history.
我认为阅读纯分析的大部头著作是相当无用的：太多的方法一下子从眼前掠过。
Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.
