Education is not preparation for life;education is life itself.

数学不知道种族或地理边界；对于数学来说，文化世界是一个国家。

I think people believe in heaven because they don’t like the idea of dying, because they want to carry on living and they don’t like the idea that other people will move into their house and put their things into the rubbish.

贫困和无知可能逐渐消失的希望，很大程度上源于十九世纪工人阶级的稳步进步。