‘One time mountains are flowing, another time they are not flowing. If you do not fully understand this, you do not understand the true dharma wheel of the Tathagata.
An ancient buddha said, “If you do not wish to incur the cause for Unceasing Hell, do not slander the true dharma wheel of the Tathagata.” Carve these words on your skin, flesh, bones, and marrow; on your body, mind, and environs; on emptiness and on form. They are already carved on trees and rocks, on fields and villages.’ (Shobogenzo Sansuikyo)
This holding of two seemingly contradictory views – flowing and not flowing – are at the heart of Buddhist understanding. As Dogen points out, everything else is comfortable with this view, so we can become intimate with it too.