The most hateful torment for men is to have knowledge of everything but power over nothing.

In science, the only constant is change.

In one of the stars I shall be living。 In one of them I shall be laughing。 And so it will be as if all the stars were laughing， when you look at the sky at night… You – only you – will have stars that can laugh.

Writing is a way of life, a way of being in the world.

教育是使人变得有道德的艺术。

每当一座煤电厂关闭，美国的一部分心脏也随之关闭。