I forgot who said this but skepticism/disbelief of everything is a necessary starting point to truly understand and appreciate the mysteries presented by ancient (and subsequently modern) religion.
This is a problem I see with society. Most who are religious were like that since the cradle and never went through this skeptical stage, nor could they imagine ever doubting their beliefs. Once we reach some intellectual maturity and independence (adulthood), then one can delve into spirituality and have a true comparison to non-belief.
This relates back to the idea of returning to childhood after adulthood. Believing requires that childish state.