Breath is the vehicle of consciousness and so, by its slow measured observation and distribution, we learn to tug our attention away from external desires toward a judicious, intelligent awareness.
B.K.S. IyengarMind is the king of the senses; breath is the king of the mind; and the nerves are king of the breath.
B.K.S. IyengarWhen you cannot hold the body still, you cannot hold the brain still. If you do not know the silence of the body, you cannot understand the silence of the mind. Action and silence have to go together. If there is action, there must also be silence. If there is silence, there can be conscious action and not just motion.
B.K.S. Iyengar