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.

Prediction is very difficult, especially about the future.

我的话在她心中：冰冷的抛光石头沉入沼泽。

Music is my refuge and also my battlefield.

It is necessary from the very nature of things that power should be a check to power.

I'm not perfect, I don't claim to be, but I'm trying.

The only way to discover the limits of the possible is to go beyond them into the impossible.

智者抵抗快乐，愚者成为快乐的奴隶。