Shvetashvatara Upanishad 1.121 min read

This (Brahman) should be meditated upon as eternal, as dwelling in one’s own soul as its essence.

Besides Brahman there is nothing else to be known.

It is the enjoyer (the individual soul), the object of enjoyment and the arbiter of the destiny of all beings (Ishvara).

He who knows Brahman in these three forms achieves liberation.