Osho talks about breathing, as in the 1st Stage of Gourishankar Meditation:
"It is not that you are breathing, but existence is breathing you. It is a change of gestalt, and it happens on its own. If you go on relaxing, accepting everything, relaxing into yourself, by and by, suddenly, you become aware that you are not taking these breaths – they are coming and going on their own.
"And so gracefully. With such dignity. With such rhythm. With such harmonious rhythm.
Who is doing it? Existence is breathing you. It comes into you, goes out of you. Each moment it rejuvenates you, each moment it makes you alive again and again and again."
Osho, Ancient Music in the Pines, Chapter #3