It happens when you get into your second childhood of old age as well. I really think that I doubt more, believe less and feel completely isolated in opinion and logic at this age then I ever have in my life. As a young child we believe pretty much everything we are told. We didn't have any choice or reason to believe otherwise. We learned and trusted pretty much anything anybody said to us. When we progress to puberty, we started to question conventional wisdom coming from our elders. But, as we grew into adult we were part of the elders that shaped us and we saw the world our own way tainted by what we were told combined with what we experienced and saw. Then we run into old age and we realize that a lot of the stuff we believed was BS and we saw things differently. Our focus change to health and once again we were forced to believe those that were in charge of keeping us alive. But, we do question the validity of a lot of things that we are told and are far more likely to be vocal and questioning. So for that we get labeled as grumpy old people. And we once again are treated like a child in condescending and insulting ways, like we are all children. I guess that is the real circle of life.