Prajāpati said - ‘When the self is sleeping, with all its organs inactive, it is free from worry and has no dreams. This is what the Self is like (i.e., it is spotless). It is immortal and fearless. It is Brahman.’ Indra left happy in mind. But even before he got back to the gods, he was troubled by a doubt: ‘When the self is in deep sleep, it is not able to recognize itself as “I am so-and-so,” as it does when it is awake. Not only that, it does not even recognize beings around it. It is as if the self has been obliterated. I don’t see that anything good will come from this’.
Indra returned with fuel in hand. Prajāpati asked - ‘Indra, you left happy in mind. What has made you come back?’ Indra replied - ‘Lord, when the self is in deep sleep, it is not able to recognize itself as “I am so-and-so,” as it does when it is awake. Not only that, it does not even recognize beings around it. It is as if the self has been obliterated. I don’t see anything good coming from this’.
Prajāpati said - ‘Indra, it is so. I will explain the matter to you again. Stay here another five years.’ Indra lived there another five years. The total time Indra spent thus was one hundred and one years. This is what sages refer to when they say - ‘Indra lived with Prajāpati for one hundred and one years practising brahmacarya.’ Then Prajāpati said to him—