Raw, adjective: 2. not having undergone processes of preparing, dressing, finishing, refining, or manufacture
The breath has a rhythm, a heartbeat, like a metronome. In through the nose, out through the nose, always steady, rhythmic, beating, undulating. Rising and falling like an ocean wave, audibly, consistently, perpetually, whether we deign to acknowledge that fact or not.
Really quite remarkable, this: the unending constancy of the breath, from that first inhale, to the final exhalation that signifies the close of this moment, in this body, in this life.
Yoga means paying attention. Paying attention to those things we most often take for granted: the heartbeat, the breath, the pinky toe, the elbow that bends, the ear that tilts. Come into the breath. Notice it. Don't take it for granted. It will not always be so.