8.24 Agnih, fire-is a deity presiding over a period of time; similarly, jyotih, light-also is a deity presiding over a period of time. Or fire and light are the well-known Vedic deities.
As the expression 'mango grove' is used with regard to a place where mango trees are more numerous, similarly, the expressions 'at which time' and 'that time' (in the earlier verse) are used in view of the predominance (of the deities presiding over time). [If the first two (fire and light) are taken as Vedic deities, then the remaining three are the only deities of time. Still, the latter being numerically greater, all the five deities are referred to as deities of time. The deities of both the Paths-of gods and manes, or of the Northern and the Southern Paths as they are called-who are gods of time, are referred to here as 'time' by such words as day, fortnight, six months, etc.]
So also, ahah, daytime, means the deity of daytime. Suklah, the bright fortnight, implies the deity presiding over the bright fortnight. Sanmasah uttarayanam, the six months of the Northern solstice-here, too, is understood the deity presiding over the Path. This is the principle (of interpretation followed elsewhere (in the Upanisads also).
Tatra, following this Path; janah, persons; who are brahma-vidah, knowers of Brahman, those engaged in meditation on (the alified) Brahman; gacchanti, attain; brahma, Brahman; prayatah, when they die. It is understood that they attain Brahman through stages. Indeed, according to the Upanisadic text, 'His vital forces do not depart' (Br. 4.4.46), there is neither going nor coming back for those established in full realization, who are fit for immediate Liberation. Having their organs merged in Brahman, they are suffused with Brahman, they are verily identified with Brahman.