数学中最美丽的东西是复杂背后的简单思想。

If you can make meat directly from plants, why would you need an animal?

Good means not merely not to do wrong， but rather not to desire to do wrong.

在暴君有权杀死一个国家的权利被证明之前，一个国家在必要时杀死暴君的权利永远不会被怀疑。

诗人在艺术里这样歌颂。