Or more directly through discussing empirical psychology, which can be pretty mind-blowing. I've just received "Mistakes Were Made" and "Predictably Irrational" from Amazon...

Derren Brown's "Tricks of the Mind" is also interesting like that - he's famous as a conjuror, but he was an evangelical Christian and is now a fairly outspoken atheist and skeptic, and IIRC he talks about how he started to understand how people fool themselves through practicing conjuring, and that he couldn't help but notice the same traits in religion.