If you want to build a great enterprise, you have to have the courage to dream great dreams.

The silliest woman can manage a clever man; but it needs a very clever woman to manage a fool.

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.