गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

tāsu tadā bhavati. yadā suptaḥ svapnaṁ na kañcana paśyaty athāsmin prāṇa evaikadhā bhavati. "Then the soul enters the nāḍīs. When sleeping, the soul does not see any dream. Then the soul become one with the prāṇas." The explanation that the soul has an option of one of these three places does not apply here, for if that option were to apply, then these three places would have to be equally suitable for the action of dreamless sleep, but the truth is they are not. What occurs is the soul passes through the door of the nāḍīs, enters the palace of the membrane surrounding the heart, and sleeps on the bed of the Supreme Personality of Godhead. In this way all three places are involved in the activity of dreamless sleep, but the Supreme Personality of Godhead is the actual place where dreamless sleep occurs. the word "purītat" here means "the membrane surrounding the lotus of the heart". Sūtra 8 ataḥ prabodho 'smāt ataḥ - therefore; prabodho - waking; asmāt - from Him. Therefore the waking state is from Him. Purport by Śrīla Baladeva Vidyābhūṣaṇa Because the Supreme Personality of Godhead is the actual place where dreamless sleep occurs and the nāḍīs and other things mentioned here are merely doors through which the soul passes in order to rest on the Supreme Personality of Godhead, therefore the waking soul rises from the bed of the Supreme Personality of Godhead. In the Chāndogya Upaniṣad it is said: satas cāgatya na viduḥ sata āgacchamahe "We had departed from the Supreme Personality of Godhead, although we could not understand that we had departed from the Supreme Personality of Godhead." In this way the idea that sometimes the soul sleeps in the nāḍīs, sometimes in the membrane surrounding the heart, and sometimes in the Supreme Personality