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

Religion isn't invented by man. Men are invented by religion. Men invent responses to Quality, and among these responses is an understanding of what they themselves are. You know something and then the Quality stimulus hits and then you try to define the Quality stimulus, but to define it all you've got to work with is what you know. So your definition is made up of what you know. It's an analogue to what you already know. It has to be. It can't be anything else. And the mythos grows this way. By analogies to what is known before. The mythos is a building of analogues upon analogues upon analogues. These fill the collective consciousness of all communicating mankind. Every last bit of it. The Quality is the track that directs the train. What is outside the train, to either side—that is the terra incognita of the insane. He knew that to understand Quality he would have to leave the mythos. That's why he felt that slippage. He knew something was about to happen.

The mythos-over-logos argument points to the fact that each child is born as ignorant as any caveman. What keeps the world from reverting to the Neandertal with each generation is the continuing, ongoing mythos, transformed into logos but still mythos, the huge body of common knowledge that unites our minds as cells are united in the body of man. To feel that one is not so united, that one can accept or discard this mythos as one pleases, is not to understand what the mythos is.

You have all these fragments, like pieces of a puzzle, and you can place them together into large groups, but the groups don't go together no matter how you try, and then suddenly you get one fragment and it fits two different groups and then suddenly the two great groups are one. The relation of the mythos to insanity. That's a key fragment. I doubt whether anyone ever said that before. Insanity is the terra incognita surrounding the mythos. And he knew! He knew the Quality he talked about lay outside the mythos.