The most important thing a woman can do for her children is to love their father.

The power of abstraction allows us to see the common threads that run through seemingly disparate problems.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

只有女子和小人最难相处，亲近了，他们说你不庄重；疏远了，他们又会怨恨你。

在数学科学中，比其他任何学科都更常见的是，那些一度最抽象、似乎远离一切实际应用的真理，在下一个时代会成为深刻物理研究的基础，并最终体现在某些实用发明中。