I think by the age of about nine I recognized that there were a lot of different religions, and it was an accident I happened to be born into one of them. If I had been born somewhere else, I would have had a different one. Which is a pretty good lesson, actually. Everyone should learn that.

Either it is true that a medicine works or it isn't. It cannot be false in the ordinary sense but true in some alternative sense. If a therapy or treatment is anything more than a placebo, properly conducted double-blind trials, statistically analyzed, will eventually bring it through with flying colours. Many candidates for recognition as orthodox medicines fail the test and are summarily dropped. The alternative label should not (though, alas, it does) provide immunity from the same fate.

‎"Matter flows from place to place, and momentarily comes together to be you. Some people find that thought disturbing; I find the reality thrilling.

Never say, and never take seriously anyone who says, 'I cannot believe that so-and-so could have evolved by gradual selection.' I have dubbed this kind of fallacy 'the Argument from Personal Incredulity.' Time and again, it has proven the prelude to an intellectual banana-skin experience.

The argument from improbability, properly deployed, comes close to proving that God does not exist.

Evolution is just a theory? Well, so is gravity and I don't see you jumping out of buildings.

If you don't know anything about computers, just remember that they are machines that do exactly what you tell them but often surprise you in the result.