I do what I do because I have a compulsion to hold forth. I don't spend a lot of time, if any, thinking about the effect my work is going to have on the world. And I have an abiding mistrust of people who think that they're going to change the world. I think that people who think that they're going to change the world are the kind of people who put bombs on airplanes.

What makes fantastic declarations believable is, in part, the vehemence with which they're proffered. Again, in the world of spirituality as well as of pop psychology, intensity of personal belief is evidence of truth. It is considered very bad form - even abuse - to challenge the veracity of any personal testimony that might be offered in a twelve-step group or on a talk show, unless the testimony itself is equivocal... Whatever sells, whatever many people believe strongly, must be true.

Only people who die very young learn all they really need to know in kindergarten.

The scarcest resource these days is reason. What's certainly striking about American culture today is the great hostility toward science and the decline of respect for rational scientific thinking. People seem to think that we are ruled by the scientific method and that we overvalue reason. If there was ever a period when we overvalued reason, I think that it was probably extremely brief. What I see now is a great deal of superstition, as much superstition as there has ever been. There are probably more people who believe in guardian angels than who understand the law of gravity.

As Camille Paglia's success has demonstrated, what is most marketable is absolutism and attitude undiluted by thought.

It's easy to sell good news like this, and the authors confidently rely on classic fallacious arguments. They argue by declaration, which is what makes the books so amusing. In matter-of-fact, authoritative tones, the authors tell us how plants and human beings exchange energy - or they describe what angels look like, whether or how they're sexed, how they communicate with human beings, and how they differ from ghosts. Readers might be expected to wonder, How do they know?

It is the inevitable effect of religion on public policy that makes it a matter of public concern. Advocates of religiosity extol the virtues or moral habits that religion is supposed to instill in us. But we should be equally concerned with the intellectual habits it discourages.