So, in summary: we're not rational beings, therefore improvement through self-delusion?

I'm sorry, but I have two problems with that approach:

    1. Knowing I'm willingly drinking snake oil believing it'll somehow improve me makes it very hard for me to look at myself in the mirror in the morning. On a good day, I'd call myself an idiot, and on a bad one a pathological liar.

    2. Once you open the door to being told fairy tales in hope of improving yourself, you also open the door to letting yourself being manipulated into believing *any* kind BS by other, manipulative people. This is precisely the kind of mental attitude that has given us all the "interesting" byproducts of religion: religious wars, religious persecution, faith-based terrorism, death cults, debasement of arbitrary category of people (eg women, gays) etc ... (the list is long and extremely gruesome).

Nope, none of that for me, thank you.