如果一个人不完全愿意随时离职，就不适合担任公职......
No man is fit to hold office who isn't perfectly willing to leave it at any time...
The world is indeed full of peril, and in it there are many dark places; but still there is much that is fair, and though in all lands love is now mingled with grief, it grows perhaps the greater.
The universe is not only stranger than we imagine, it is stranger than we can imagine.
想象反事实的能力是区分人类和机器的关键。
事实上，今天的美国女性比以往任何时候都拥有更多的自由和机会。
证据的确定性并不导致信仰的确定性。
到达顶峰的唯 一方法是攀登高山，而不是等待电梯。