There are indications because of new inventions, that 10, 15, or 20 nations will have a nuclear capacity, including Red China, by the end of the Presidential office in 1964. This is extremely serious. I think the fate not only of our own civilization, but I think the fate of world and the future of the human race, is involved in preventing a nuclear war.

Khrushchev reminds me of the tiger hunter who has picked a place on the wall to hang the tiger's skin long before he has caught the tiger. This tiger has other ideas.

The greater our knowledge increases the more our ignorance unfolds.

Domestic policy can only defeat us; foreign policy can kill us.

The wave of the future is not the conquest of the world by a single dogmatic creed but the liberation of the diverse energies of free nations and free men.

I want to emphasize in the great concentration which we now place upon scientists and engineers how much we still need the men and women educated in the liberal tradition, willing to take the long look, undisturbed by prejudices and slogans of the moment, who attempt to make an honest judgment on difficult events.

Not everyone has equal abilities, but everyone should have equal opportunity for education.