In plain words
As long as there are resolves and doubts in this Manas, we do not escape birth. When through the feeling of Brahman we bring these resolves and doubts to the state of no-mind, we have no birth of any kind after that. So, Bhārgava! You think that birth and death are beginningless, that they cannot be escaped. No, no. The great sage Pippalāda gave him a fine answer: there is the chance to go to a state beyond birth and death. After that the third disciple came in. He bowed to the guru: Swami! What kinds of prāṇas within these beings protect it, nourish it and … its growth? He was Aśvalāyana. This Aśvalāyana came: Swami! Who is the chief jīva among all these jīvas? This jīva has many limbs. In the many limbs there is some one power that is the same in all. What is that power? he asked. Child! From ākāśa come air, fire, water and earth. Their portions, speech, sight, hearing and Manas, these four protect living beings. Chief among them is prāṇa, which is the principle of the sun. Without prāṇa itself, the eyes are unable to see. The ears are unable to hear, the mouth unable to speak. Manas cannot do its own work. So prāṇa is the chief, above all the limbs. The home of this prāṇa is the body. So prāṇa lives on, taking shelter in the temple called the body. Deho devālaya prokto jīvo deva sanātanaḥ. This prāṇa is eternal. It has taken shelter in this new body as in a dwelling. Within this body a hundred thousand nāḍīs open out and spread everywhere through its lesser limbs. The body is not something merely ordinary. The body is pervaded by a hundred thousand nāḍīs. When we truly inquire, there are seventy-two crore nāḍīs in the body. Through these seventy-two crore nāḍīs moves the prāṇa called vyāna. If this prāṇa called vyāna were not there, these nāḍīs could not work at all; the prāṇa called udāna stays in the upward gaze. On the basis of the meritorious and sinful karmas man has done, it constantly brings him to their respective places. So each of our places depends wholly on the karmas we do. So the śāstras go on teaching: do not sink under sorrows, do not swell with joys, but follow evenness. Sorrows are not handed to us by someone. Joys too are not something someone has done to help us. We ourselves are the root cause of our sorrows and our joys.