न प्राणेन नापानेन मर्त्यो जीवति कश्चन । इतरेण तु जीवन्ति यस्मिन्नेतावुपाश्रितौ ॥ ५॥

No mortal ever lives by prana, which goes up, nor by apana, which goes down. Men live by something different, on which these two depend.