If not for me, the H-bomb would have been developed in Russia first. In the U.S., we'd now be speaking Russian.

I am guilty of the great crime of optimism.

I claim that relativity and the rest of modern physics is not complicated. It can be explained very simply. It is only unusual or, put another way, it is contrary to common sense.

When you're certain you cannot be fooled, you become easy to fool.

If anyone wants a hole in the ground, nuclear explosives can make big holes

Today, nothing is unusual about a scientific discovery's being followed soon after by a technical application: The discovery of electrons led to electronics; fission led to nuclear energy. But before the 1880's, science played almost no role in the advances of technology. For example, James Watt developed the first efficient steam engine long before science established the equivalence between mechanical heat and energy.

Physics without mathematics is meaningless.