Moksha, as per
Vishnu Sahasranama .
Tattvam Tattvavid Ekatma Janma-Mrityu-Jaraatigah ||103||
Tattvam - (Thasya Bhaavam) - Tat refers to the supreme reality, Brahman. ( In the context of Vedanta as in Tat tvam asi)
Tattvavid vid means 'to know', Tattvavid is one who has realised That (Brahman refered to as Tattvam).
Ekatma Realization as, Tattvam and Tattvavid are One Atma.
Janma-Mrityu-Jaraatigah Emancipation from transmigration, meaning Liberation or Moksha.
Chandhogya Upanishad 6.1.4
yathā somyaikena see nāmadheyaṃ mṛttiketyeva satyam || 6.1.4 ||
Somya, young man; yathā, just as; ekena mṛtpiṇḍena, from one single lump of earth; sarvam mṛnmayam vijñātam, all objects made of earth are known; vācārambhaṇam nāmadheyam vikāraḥ, all changes are mere words, in name only; mṛttika iti eva satyam, the earth is the reality.
O Somya, it is like this: By knowing a single lump of earth you know all objects made of earth. All changes are mere words, in name only. But earth is the reality.
To explain the same , through an analogy of gold ornaments, how is it possible to distinguish the gold contained in a bangle from the gold contained in a necklace.(In the context of golden ornaments)
Gold ,as such ,is not constrained by ornaments for its existence , On the other hand, ornaments aren't anything apart from the gold, though they appear in various forms and names owing to one's sensory perception.
In a dreamers plane of awareness , the dream may seem to be the reality , but is an illusion once the same dreamer is awakened from sleep .
Sages could dwell in that plane of awareness , through all their sadhana so as to see Brahman in all ,which might seem to be strange for a normal person though.