"History is not just a record of the past, but a mirror reflecting the present."

The war on coal is a war on the American worker.

我不想早上醒来时想，‘我要去工作赚钱。’我想醒来时想，‘我要去工作因为我热爱我所做的事。’

With great power comes the need for great caution.

Profit should never come at the expense of the planet.

数学的美在于它能够以最优雅的方式描述宇宙。

I don't want to be a superstar. I want to be a super person.

为了知识本身而追求知识，对正义的近乎狂热的热爱，以及对个人独立的渴望——这些是犹太传统的特征，让我感谢命运让我属于它。