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.

略知一点哲学可能使人倾向于无神论，但深刻的哲学可能使人回归到宗教。

中年之后，只有已为告别人生做好准备的人，才能继续在生活中朝气蓬勃。