At the extremes it is difficult to distinguish pseudoscience from rigid, doctrinaire religion.

In the deepest sense the search for extraterrestrial intelligence is a search for ourselves.

If we're capable of conjuring up terrifying monsters in childhood, why shouldn't some of us, at least on occasion, be able to fantasize something similar, something truly horrifying, a shared delusion, as adults?

Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.

In a complex universe, in a society undergoing unprecedented change, how can we find the truth if we are not willing to question everything and to give a fair hearing to everything?

Thus the recent rapid evolution of human intelligence is not only the cause of but also the only conceivable solution to the many serious problems that beset us.

When permitted to listen to alternative opinions and engage in substantive debate, people have been known to change their minds. It can happen.