“Let us take a cursory view of these seven aspects by drawing two tables.
Now what does Plato teach? He speaks of the interior man as constituted of two parts – one immutable and always the same, formed of the same substance as Deity, and the other mortal and corruptible. These “two parts” are found in our upper Triad, and the lower Quaternary (vide Table).
He explains that when the Soul, psuche, “allies herself to the Nous (divine spirit or substance), she does everything aright and felicitously”; but the case is otherwise when she attaches herself to Anoia, (folly, or the irrational animal Soul).
Here, then, we have Manas (or the Soul in general) in two aspects: when attaching itself to Anoia (our Kama rupa, or the “Animal Soul” in “Esoteric Buddhism”), it runs towards entire annihilation, as far as the personal Ego is concerned; when allying itself to the Nous (Atma-Buddhi) it merges into the immortal, imperishable Ego, and then its spiritual consciousness of the personal that was, becomes immortal.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 