The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. 'If a man is ill, his relatives assemble round him and ask: "Dost thou know me? Dost thou know me?" Now as long as his speech is not
merged in his mind, his mind in breath, breath in heat (fire), heat in the Highest Being (devatâ), he knows them.
2. 'But when his speech is merged in his mind, his mind in breath, breath in heat (fire), heat in the Highest Being, then he knows them not.
'That which is the subtile essence, in it all that exists has its self. It is the True. It is the Self, and thou, O Svetaketu, art it.'
'Please, Sir, inform me still more,' said the son.'
'Be it so, my child,' the father replied.
107:2 The question supposed to be asked is: By what degrees a man, who has been properly instructed in the knowledge of Brahman, obtains the Sat, or returns to the True. To judge from the text both he who knows the True and he who does not, reach, when they die, the Sat, passing from speech to mind and breath and heat (fire). But whereas he who knows, remains in the Sat, they who do not p. 108 know, return again to a new form of existence. It is important to observe that the commentator denies that he who knows, passes at his death through the artery of the head to the sun, and then to the Sat. He holds that with him who knows there is no further cause for delay, and that as soon as he dies, he returns to the Sat.