157. Sarvan srijati i.e., creates all things by attaining to the condition of the universal cause, for the unmanifest is the universal cause. Between such a one and the Supreme Soul there is no difference. Even this is said in the last sentence.
158. The man who reads the book called Veda is not truly conversant with the Veda. He, however, who knows Kshetrajna, is regarded as truly knowing the Veda.
159. The argument is that Mrityu or death being of two syllables, the correspondence is justifiable between it and Mama or mineness which also is of two syllables. So in the case of Brahman and na-mama. Of course, what is meant by mineness being death and not-mineness being Brahman or emancipation, cannot be unintelligible to one who has carefully read the preceding sections.
160. i.e., the five great elements, four organs of knowledge with mind, and the four organs of action.
161. The word Purusha here is used in the sense of dehabhimani Jiva or individual self with consciousness of body. True knowledge destroys this condition of Jiva, for the man of knowledge identifies himself with the universe and thereby assimilates himself to Brahman. By eaters of Amrita are meant they who never take any food without offering portions thereof to the deities, Pitris, and guests. Of course, Yogins of piety are implied by it.
162. Purusha here implies Jiva divested of consciousness of body.
163. The meaning is this: in a dream what is seen is all unreal. So, when tranquillity has been attained, all the surroundings become unreal. Nilakantha gives a slightly different interpretation; it is this: when tranquillity has been attained, the Soul lives without attachment to the body and all external objects. Indeed, the Soul then lives completely in itself even as it works in course of a dream.
164. The sense is that they behold all worldly objects, present, past and future, which are, of course, due to development of previous causes.
165. This line is rather obscure. The sense seems to be this: no one can know the Supreme Deity if it is not the latter's pleasure to be known. One, therefore, understands Him in exactly that measure in which it is His pleasure to be known.
166. Krishna's father Vasudeva is maternal uncle. Yudhishthira asks Krishna to worship Vasudeva and Valadeva on his behalf, i.e., he charges Krishna to bear to them a message of respect and love from him.