发现可能性的极限的唯一方法就是超越它们进入不可能。

"The colony is the place where the project of a new humanity is to be tested, where the dream of a world without borders is to be realized, where the dream of a world without races is to be realized, where the dream of a world without nations is to be realized, where the dream of a world without classes is to be realized, where the dream of a world without genders is to be realized, where the dream of a world without religions is to be realized, where the dream of a world without money is to be realized, where the dream of a world without property is to be realized, where the dream of a world without war is to be realized."

The natural and moral world is the two-fold object of man's rational care.

数学家的工作永无止境；总有新的问题要问，新的谜题要解。

一旦就接受了自己的缺点，就没有人能用它们来攻击你了。