Unlike the plant, the human being is a living being without fixed roots. One that walks, is mobile. One that also moves in spirit. Differently than the animal? In space and in time, the human being moves. That makes possible acquiring material and spiritual food, but also going astray, sometimes at the risk of existence. What, then, can safeguard existence in a living being that is partly nomadic in body and spirit? The breath. Breath is the source and food of natural and spiritual life for the human being. To cultivate life comes down to preserving and educating breathing, the origin of an autonomous existence, but also of the soul, understood in its original sense, as living.