Reading computer manuals without the hardware is as frustrating as reading sex manuals without the software.

There is the possibility that humankind can outgrow its infantile tendencies, as I suggested in 'Childhood's End.' But it is amazing how childishly gullible humans are.

When one has to ask, "Am I really in love?" the answer is always "No".

Somewhere in me is a curiosity sensor. I want to know what's over the next hill. You know, people can live longer without food than without information. Without information, you'd go crazy.

Space can be mapped and crossed and occupied without definable limit; but it can never be conquered.

This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one.

A well-stocked mind is safe from boredom.