The only person who is educated is the one who has learned how to learn and change.

释义：现实政治只承认实力，而非道德正义。

事实是，最多人的最大幸福是衡量对与错的标准。

要真正掌握量子力学的本质，必须接受那些挑战我们经典直觉的悖论。

Our goal is to organize the world's information and make it universally accessible and useful.

你必须经历风雨才能欣赏阳光。