If you think, “I breathe,” the “I” is extra. There is no you to say “I.” What we call “I” is just a swinging door which moves when we inhale and when we exhale. It just moves; that is all. When your mind is pure and calm enough to follow this movement, there is nothing: no “I,” no world, no mind nor body: just a swinging door. – Shunryu Suzuki: Zen Mind, Beginner’s Mind

In Fukanzazengi, Master Dogen Wrote …

… Let the breath pass imperceptibly … [NISHIJIMA]