At the risk of droning, Lamb... 
Once as a teen I went to a concert and did the hysterical screaming thing (do NOT ask me who was playing, I will never tell, waaaaay too shaming). In one part of my mind I knew that it was a bit mad, what I was doing, but the other part of my - mind? - not sure - just seemed to want to be part of that crowd energy. It seemed, not logical, but, somehow, the right thing to do at the time.
DH is a musician and he often talks of being "in the zone" with other players, where each person knows what the other is going to do and it all feels a bit magic. Experiences like that are outside of the normal way of things, and pretty inexplicable. I mean, you probably could come up with an explanation, but DH wouldn't be interested in hearing it. He's after creating it and experiencing it, not the explanation.
Final part of drone: people don't have the same faith in authority that they might have had in ages past. There are lots of different explanations for things (for one instance, just look at all the threads on dieting on here, with many, many different ideas about the "right" way of doing it, all claiming scientific backing to a greater or lesser degree, and many claiming that the government advice is wrong - so the authority that is supposed to "care" for us is seen as fallible). In the absence of a unifying belief, people choose to believe according to individual criteria.