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.

Struggle for freedom. Where people are denied the right of choice, recourse to such struggle is the only means of achieving their liberties.

There are only two realities in life: death and laughter. We can do nothing to change the former, so we might as well do all we can to save the latter.

Let both sides seek to invoke the wonders of science instead of its terrors. Together let us explore the stars, conquer the deserts, eradicate disease, tap the ocean depths, and encourage the arts and commerce.

The supreme reality of our time is the vulnerability of our planet.

History will never accept difficulties as an excuse.

One person can make a difference, and everyone should try.