Insanity = Religion?

"When one person suffers from a delusion, it is called insanity. When many people suffer from a delusion, it is called Religion." - Robert M. Pirsig

I may offend plenty by this blog but here it goes anyways.

How do we define delusion? In Psychiatry, delusion is a false belief strongly held in spite of invalidating evidence. It is also defined as a false belief or opinion.

So if a person thinks he can fly without the aid of any equipment or machine, we call him insane. Of course no human being can fly, that is just beyond reason and logic. That person has to prove that he can fly for us to believe he is not insane.

But if millions of people believe that they will go to a place of blissful everlasting happiness after their heart stop beating because they believe in a certain doctrine, we don't call those people insane. We as society just simply believe it to be the truth cause a certain ancient writings says so and it has been taught to be the case for thousands of years. Where is the proof that this event will happen? We don't need proof, we need to have faith.

All we need is faith and that is my main argument. Why can't we have faith that the person who claims he can fly can really fly? Isn't one person's belief just as true as millions of people's belief regardless of how unreasonable and illogical that belief may be? Robert Pirsig is so correct. I rest my case.