Believe it or not if you will, there was a case of a mind over er situation in which the mind defies science itself.
The man who is able to sit in a tub that is as tall as himself, full of ice and cold water, is Wim Hof. He can do this for at least 20 minutes without having his core body temperature drop and having his heart rate increase. Here are some links from Wikipedia to prove what he does: http://en.wikipedia.org/wiki/Wim_Hof#References
I find it a bit funny that the topic went from religion to superhuman abilities. It shows that occasionally, we need to dab into this in order to get a grip onto our opinionated sides.
As for what Crater says regarding most of what Otto wanted to have explained, it all sounds logical completely. We can't always just take one perspective when looking for a solution / explanation.