Since you ask I had four years of MIU and I can tell you the order of the
Vedas. It goes Rig sama yajur atharva ayur dhanur forget and sthapatya, so
that's the vedas first then the upaveda, then the upangas or limbs, so the
six dharshanas, then the Upanishads, Aranyaka and Brahmanas, finally you get
the smritis and puranas of which Itihasa is the most extrapolated. Thus the
first letter of Rig is A and contains everything and all is made more
manifest and I believe that MMY thinks that all the Veda is Aparushaya and
not just the first four. Meaning including all the upanioshads and aranyakas
and so on but that would be patently stupid as descriptions of herbs make no
sense in noncarbon living systems and so on so ostensibly what is eternal
is merely that which has samhita of the rishi devata and chandas or the
Veda. Expressed primarily as meter or Sky Dancer.