数学的美在于它能够以最抽象的术语描述宇宙。

In the end, we will remember not the words of our enemies, but the silence of our friends.

The key to success is to keep pushing yourself.

When I got tired, I slept. When I got hungry, I ate. When I had to go, you know, I went.

学到的不是动作，而是意义。

The teacher is not in school to impose certain ideas or to form certain habits in the child, but is there as a member of the community to select the influences which shall affect the child and to assist him in properly responding to those influences.

不能通过正式手段从非正式到正式。

有人说我有唱诗班男孩的声音，却长得像女校长。

四元数的诞生，如同几何、代数、形而上学和诗歌这四位父母的奇特后代。