The most striking impression was that of an overwhelming bright light. I had seen under similar conditions the explosion of a large amount—100 tons—of normal explosives in the April test, and I was flabbergasted by...

I looked for it [heavy hydrogen, deuterium] because I thought it should exist. I didn’t know it would have industrial applications or be the basic for the most powerful weapon ever known [the nuclear bomb]...

The fact that no limits exist to the destructiveness of this weapon [the ‘Super’, i.e. the hydrogen bomb] makes its very existence and the knowledge of its construction a danger to humanity as a whole....

The scientist is not responsible for the laws of nature. It is his job to find out how these laws operate. It is the scientist’s job to find the ways in which these laws can...

Suddenly, there was an enormous flash of light, the brightest light I have ever seen or that I think anyone has ever seen. It blasted; it pounced; it bored its way into you. It was...

I am an atheist, but as far as blowing up the world in a nuclear war goes, I tell them not to worry.

I am an atheist.

Should the research worker of the future discover some means of releasing this [atomic] energy in a form which could be employed, the human race will have at its command powers beyond the dream of...