This philosophy of monism received its highest expression in the Upanishad commentaries of Shankara.
The primary meaning is the plain sense of the terms of the Upanishad, and Vyas says it in his aphorisms.
The text of the Upanishad thus transfers a future state of non-difference to that time when difference actually exists.
The remainder of this Upanishad is supplementary, but contains several passages of considerable interest.
The remainder of the poem is independent of the Upanishad and goes far beyond its doctrines.
The fundamental idea of this Upanishad is that the sacred syllable is an expression of the universe.
For him who knows this, there is this Upanishad, or secret vow, 'Beg not!'
It purports to be an Upanishad of the Atharva Veda and can hardly be described as other than a forgery.
The sketch of his doctrines which it contains is clearly a preliminary study elaborated and amplified in the Upanishad.
These passages are arranged in the order in which the text of the Upanishad exhibits them.