It

If the painter or poet, the actor or archer, were asked how to express in a word what it is that gives life and breath to all living things, what sustains them in the “undancing dance” of coming-to-be and passing away, he would probably answer: “It.” In all action and non-action, “It” is there by not being there. This is a clumsy but perhaps the closest description of what it is whose form is not this and not that, but whose hidden essence is active in all forms that are.

– Eugen Herrigel, The Method of Zen (trans. Hull)