The United States, and other advanced nations, will someday be able to produce instruments of death so terrible the world will be in abject terror of itself and its ability to end civilization.... Such war-making weapons should be developed - but only for purposes of discovery and experimentation

The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

The dove is my emblem.

The First 40 hours of work per week are for survival. Everything after that is for success.

Your worth consists in what you are and not in what you have.

If I had not had so much ambition and not tried to do so many things, I probably would have been happier, but less useful.

It is apparent to me that the possibilities of the aeroplane, which two or three years ago were thought to hold the solution to the [flying machine] problem, have been exhausted, and that we must turn elsewhere.