“There is only one kind of person, Phædrus said, who accepts or rejects the mythos in which he lives. And the definition of that person, when he has rejected the mythos, Phædrus said, is "insane."”
To go outside the mythos is to become insane.
Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 28
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Robert M. Pirsig 164
American writer and philosopher 1928–2017Related quotes

Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 28
Context: 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.

Speech to the Consultative Assembly of the Council of Europe, Strasbourg, France (23 January 1967), quoted in The New York Times (24 January 1967), p. 12.
Prime Minister

Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 6
Identifying his "destroyed" personality as "Phædrus"
Context: Now I want to begin to fulfill a certain obligation by stating that there was one person, no longer here, who had something to say, and who said it, but whom no one believed or really understood. Forgotten. For reasons that will become apparent I'd prefer that he remain forgotten, but there's no choice other than to reopen his case.
I don't know his whole story. No one ever will, except Phædrus himself, and he can no longer speak. But from his writings and from what others have said and from fragments of my own recall it should be possible to piece together some kind of approximation of what he was talking about.

Retreat to Priests, Washington, D.C., p. 19, quoted in Bernard Hayes, C.R., To Live as Jesus Did (Locust Valley, N.Y.: Living Flame Press, 1981), p. 108. There is no book by Sheen with the title Retreat to Priests. Hayes is presumably quoting from a transcription of Sheen's 1974 retreat for priests of the Washington diocese. This was recorded on reel-to-reel tape and later issued in nine 60-minute tapes under the title Renewal and Reconciliation.
But the person who is thus labeled an outsider may have a different view of the matter. He may not accept the rule by which he is being judged and may not regard those who judge him as either competent or legitimately entitled to do so. Hence, a second meaning of the term emerges: the rule-breaker may feel his judges are outsiders.
Source: Outsiders: Studies in the Sociology of Deviance (1963), pp. 1-2.

“When God wants to drive a person insane, he grants that person's every wish.”
Source: The Valkyries

Narrated in Saheeh Muslim, Book 032, Number 6180 http://www.usc.edu/dept/MSA/fundamentals/hadithsunnah/muslim/032.smt.html#032.6180
Sunni Hadith