I don't think it had ever occurred to me that man's supremacy is not primarily due to his brain, as most of the books would have one think. It is due to the brain's capacity to make use of the information conveyed to it by a narrow band of visible light rays. His civilization, all that he had achieved or might achieve, hung upon his ability to perceive that range of vibrations from red to violet. Without that, he was lost.

No... souls are just counters for churches to collect, all the same value, like nails. No, what makes man man is mind; it's not a thing, it's a quality, and minds aren't all the same value; they're better or worse, and the better they are, the more they mean.

Knowing makes all the difference... It's the difference between just trying to keep alive, and having something to live for

The humans have a curious force they call ambition. It drives them, and, through them, it drives us. This force which keeps them active, we lack. Perhaps, in time, we machines will acquire it.

Knowledge is simply a kind of fuel; it needs the motor of understanding to convert it into power.

The essential quality of life is living' the essential quality of living is change; change is evolution; and we are part of it.

There was often a great deal of grown-up fuss that seemed disproportionate to causes.