The single thing which makes any man happiest is the realization that he has worked up to the limits of his ability, his capacity. It's all the better, of course, if this work has made a contribution to knowledge, or toward moving the human race a little farther forward.

As a boy, because I was born and raised in Ohio, about 60 miles north of Dayton, the legends of the Wrights have been in my memories as long as I can remember.

Fear is not an unknown emotion to us.

Good luck, Mr. Gorsky!

Houston, Tranquillity Base here. The Eagle has landed.

Shoot for the stars but if you happen to miss shoot for the moon instead.

The regret on our side is, they used to say years ago, we are reading about you in science class. Now they say, we are reading about you in history class.