True leadership means having the courage to make unpopular decisions when they're the right ones.

我在数学上花费的时间越多，我就越感到兴奋。

"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."

我了解到人们会忘记你说过的话，忘记你做过的事，但永远不会忘记你带给他们的感受。

物理学的美在于它能够用简单的定律解释复杂的事物。