Quotes from book
Zen and the Art of Motorcycle Maintenance

Zen and the Art of Motorcycle Maintenance: An Inquiry into Values , by Robert M. Pirsig, is a book that was first published in 1974. It is a work of fictionalized autobiography, and is the first of Pirsig's texts in which he explores his Metaphysics of Quality.

“I think metaphysics is good if it improves everyday life; otherwise forget it.”
Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 20

“The number of rational hypotheses that can explain any given phenomenon is infinite.”
Source: Zen and the Art of Motorcycle Maintenance (1974), Ch. 9; in Ch. 22 (see below) Pirsig recounts finding that Henri Poincaré had made a similar statement decades earlier.

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.