交换、交易和互换的倾向普遍存在于所有人之中，而在其他动物种族中找不到。

We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.

我不是那种会让对拼搏的热爱减少的人。

Growing up is losing some illusions, in order to acquire others.

I make art to understand the world and my place in it.