When a person is seriously ill, O Somya, his relatives sit around him and ask - ‘Do you recognize me? Do you recognize me?’ So long as his speech does not merge with his mind, his mind with his prāṇa, his prāṇa with the heat in his body, and the heat with the Supreme Self, he will be able to recognize them.
Then when his speech merges into his mind, his mind into prāṇa, his prāṇa into the heat in his body, and the heat into the Supreme Self, he no longer knows them.
‘That which is the subtlest of all is the Self of all this. It is the Truth. It is the Self. That you are, O Śvetaketu.’ Śvetaketu then said - ‘Sir, please explain this to me again.’ ‘Yes, Somya, I will explain it again,’ replied his father.