“The only Zen you find on tops of mountains is the Zen you bring there.”
Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 20
Context: Zen is the "spirit of the valley." The only Zen you find on the tops of mountains is the Zen you bring up there.
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Robert M. Pirsig 164
American writer and philosopher 1928–2017Related quotes

Lecture in Los Altos, CA (1 September 1967) http://www.shunryusuzuki.com/suzuki/transcripts-pdf/67-pdf/67-08-31U.pdf
Context: What is true zazen? What do you mean by Zen becomes Zen and you become you? You become you is a very important point. You become you. When you become you, even though you are in bed, you may not be you most of the time. Even though you are sitting here, I wonder whether you are you in its true sense. So to be you is zazen.

“Zen masters say you cannot see your reflection in running water, only in still water.”
Source: Eat, Pray, Love
“I just had to stay cool. Zen. No punching in the face. Punching would not be Zen.”
Source: Magic Bleeds

The Paris Review interview (1982)
Context: My Zen master, because I’ve studied Zen for a long time, told me that every one (and all the stories weren’t written then) of the Mary Poppins stories is in essence a Zen story. And someone else, who is a bit of a Don Juan, told me that every one of the stories is a moment of tremendous sexual passion, because it begins with such tension and then it is reconciled and resolved in a way that is gloriously sensual. … A great friend of mine at the beginning of our friendship (he was himself a poet) said to me very defiantly, “I have to tell you that I loathe children’s books.” And I said to him, “Well, won’t you just read this just for my sake?” And he said grumpily, “Oh, very well, send it to me.” I did, and I got a letter back saying: “Why didn’t you tell me? Mary Poppins with her cool green core of sex has me enthralled forever.”

This appears in what could be either a paraphrase, a quote, or a re-translation of Pirsig in My Mercedes Is Not for Sale : From Amsterdam to Ouagadougou : An Auto-misadventure Across the Sahara (2006) by Jeroen van Bergeijk, in a 2008 translation books.google http://books.google.de/books?id=pIOcbS2Pl8kC&pg=PA26; Dutch original: books.google http://books.google.de/books?id=4zIzAgAAQBAJ&q=geoefende.
Disputed

“Zen is the "spirit of the valley."”
The only Zen you find on the tops of mountains is the Zen you bring up there.
Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 20