数学的本质在于它的自由。

I'm not afraid to take a stand. Everybody, come take my hand. We'll walk this road together, through the storm. Whatever weather, cold or warm.

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.

伟大的事情从来不会来自舒适区。

如果一件事情对你很重要，即使成功的概率很小，你也应该去做。

Consciousness is the cutting edge of adaptation.

I always prefer to believe the best of everybody; it saves so much trouble.