我们是我们一再重复的行为。因此，卓越不是一种行为，而是一种习惯

在数学中，你并不理解事物。你只是习惯了它们。

The greatest tragedy in life is not death, but the unlived life.

解释：在人活动范围内的水就污浊，在野外无人地方的水就清洁。同为一样的水，都是从天边开源，有的混浊有的清洁，这是它们所处环境使它们这样的。

"To heal, you have to feel."

Sex is the only consolation for the misery of existence.

Look at the stars, look how they shine for you.

The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.