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

Though the man-apes often fought and wrestled one another, their disputes very seldom resulted in serious injuries. Having no claws or fighting canine teeth, and being well protected by hair, they could not inflict much harm on one another. In any event, they had little surplus energy for such unproductive behavior; snarling and threatening was a much more efficient way of asserting their points of view.

Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering.

You can't have it both ways. You can't have both free will and a benevolent higher power who protects you from yourself.

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

Religion is the most malevolent of all mind viruses.

If children have interests, then education happens.