"Sometimes we get sad about things and we don’t like to tell other people that we are sad about them."

In the world of physics, we often find that the simplest questions are the hardest to answer.

In mathematics, the art of proposing a question must be held of higher value than solving it.

Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. And not to Democrats alone do I make this appeal, but to all who love these great and true principles.

The novel is the one bright book of life. Books are not life. They are only tremulations on the ether.

我不明白为什么人们害怕新想法。我害怕的是旧的想法。