Some again offer up all the operations of the senses and the operations of the life-breaths into the fire of devotion by self-restraint, kindled by knowledge. Others perform the sacrifice of wealth, the sacrifice of penance, the sacrifice of concentration of mind, the sacrifice of Vedic study, and of knowledge, and others are ascetics of rigid vows. Some offer up the upward life-breath into the downward life-breath, and the downward life-breath into the upper life-breath, and stopping up the motions of the upward and downward life-breaths, devote themselves to the restraint of the life-breaths. Others, who (take) limited food, offer up the life-breaths into the life-breaths.