As the journalists of the time phased it, this was the epoch of the Leap into the Air. The new atomic aeroplane became indeed a mania; everyone of means was frantic to possess a thing so controllable, so secure and so free from the dust and danger of the road, and in France in the year 1943 thirty thousand of these new aeroplanes were manufactured and licensed, and soared humming softly into the sky.

I never yet heard of a useless thing that was not ground out of existence by evolution sooner or later. Did you? And pain gets needless.

A federation of all humanity, together with a sufficient measure of social justice, to ensure health, education, and a rough equality of opportunity to most of the children born into the world, would mean such a release and increase of human energy as to open a new phase in human history.

The great trouble with you Americans is that you are still under the influence of that second-rate - shall I say third-rate? - mind, Karl Marx.

But I was too restless to watch long; I'm too Occidental for a long vigil. I could work at a problem for years, but to wait inactive for twenty-four hours - that's another matter.

There's nothing wrong in suffering, if you suffer for a purpose. Our revolution didn't abolish danger or death. It simply made danger and death worthwhile.

Biologically the species is the accumulation of the experiments of all its successful individuals since the beginning.