Before I had studied Zen for thirty years, I saw mountains as mountains, and rivers as rivers. When I arrived at a more intimate knowledge, I came to the point where I saw that mountains are not mountains, and rivers are not rivers. But now that I have got its very substance I am at rest. For it's just that I see mountains once again as mountains, and rivers once again as rivers.
They were later made famous by Donovan Leitch who crafted them into song:
Allman Brothers instrumental version, Mountain Jam:
Grateful Dead perform Mountain Jam at Watkins Glen Festival with Allman Brothers joining in: