Clouds arise and dissolve in Sky Mind continually, and this movement is not limited by physicality. The stream flows and is not limited by the landscape through which it moves. It may be in a rich and verdant valley where it flows fast and full. It may be trickling through limestone in an underwater cavern. It may be struggling through a barren wasteland as a tiny remnant of its former power. Movement of mind continues.
Spacious Passion, Ngakma Nor´dzin, Aro Books worldwide, 2006, ISBN 978-0-9653948-4-0,chapter 5 Infinite Impermanence, p111