Concepts about these hidden valleys vary, even among learned lamas. Some say that a person who is not spiritually advanced—someone without the karma to find or enter one—could climb into the high mountains, stumble upon one of these valleys and not even realize it. One could walk through a landscape that would be transformed into a place of miracle and wonder by a person of spiritual understanding, and notice nothing. William Blake once said, ‘If the doors of perception were cleansed, everything would appear to man as it is, infinite.

— A Step Away from Paradise by Thomas K. Shor, Jetsunma Tenzin Palmo (Page 24)