If you meddle in other people's marriages you may lose a friend, but acquire his wife.

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'

The only person you are destined to become is the person you decide to be.

勇气是生命为给予平静所要求的代价。

I'm a black American, I am proud of my race. I am proud of who I am. I have a lot of pride and dignity.

The work of art is a scream of freedom.

数学的美在于它的简洁性和普遍性。