952 Quotes by Isaac Asimov

Of course there are worlds. Millions of them! Every star you see has worlds, and most of those you don't see.

Humanity today forms a single species and can interbreed freely. Differences in color of hair, skin and eyes are largely due to differences in the quantity of a pigment called melanin, and this does not affect humanity's essentially unitary character. Nor do differences in the shape of the eye or nose, in the shape of the skull, or in height.

...the Earth in general can only support so much animal life, and for every aditional pound of human beings and his animal favorites, a pound of other animal life must disappear.

And his idea of solid comfort was to be left in utter solitude for two or three hours.

We were never under any delusions as to which was more important, an individual or humanity.

Humanists recognize that it is only when people feel free to think for themselves, using reason as their guide, that they are best capable of developing values that succeed in satisfying human needs and serving human interests.

Have you ever come across something you couldn't explain?""Explain in what way? I could explain a ghost by saying, 'yes, that's a ghost.' I take it that's not what you mean.

There was no doubt about it: the City was the culmination of man’s mastery over the environment. Not space travel, not the fifty colonized worlds that were now so haughtily independent, but the City.

That was the trouble with the Outside. One teetered forever between unpleasant alternatives.