The Placebo Effect, once categorized as merely fooling some people into believing they feel better by some power of suggestion, continues to amaze researchers by demonstrating real power to cure an increasing variety of medical conditions. This would appear to be a coaxing of resources otherwise held unused within the human body and/or mind.
Nothing is better than a good argument about religion, so what’s the (even remote) possibility that something akin to the placebo effect is the underlying source of religious fervor also inherent in humans to various degrees? Finally, even if "god" is a placebo, (checks for clouds before leaving building) does that really matter so long as otherwise inexplicable positive effects manifest nevertheless?
Link to article:
The placebo effect as witnessed in religion