While paramashiva kAmeshvara mahAbhaTTAraka can only be described through expressions such as shuddha, buddha, chidAnanda etc., he assumes a form (chinmayAkAra) to aid contemplation of the bhakta. The pauShkarAgama says:
sAdhakasya tu lakShyArtham tasya rUpamidam smR^itam ||
While the IshAnAdi pancha brahma mantras are known to represent the five faces of sadAshiva, they are also the five angas of Lord mahAkAmeshvara:
On account of kAmeshvara svarUpa being chinmaya or of the nature of pure consciousness, his organs are represented by these mantras. Thus, the divine form of the Lord is mantrAtmaka. It should also be understood that the word anga is simply a samjnA as explained later. As with everything else, the same is true in the case of mahAkAmeshvarI who is described as “mUlakUTatrayakalevarA”. The names shrImadvAgbhavakUTaika svarUpa-mukhapankajA etc. embed in them the nyAsa sa~Nketa as also the following verses which illustrate the five limbs of the parama-puruSha, who, in reality, is niShkala. It must be remembered that mrgendrAdyAgama-s trace the origin of the panchabrahma mantras to shuddha panchAkSharI.
IshAna mantra represents the mastaka (head) of the Lord.
IShTe yena jagatsarvaM
mUrdhA nAvayavastanoH ||
While we speak of limbs here, special attention must be repeatedly paid to the word: nAvayavastanoH. A venerable commentator on this verse further adds:
sa uttamA~Ngavat sarvordhvasthitatvAnmUrdheva mUrdhA, na paramArthato dehAvayavaH ||
This understanding should not be abandoned even for a minute while contemplating on mastakAdyavayava-s of the devatA mUrti.
tatpuruSha mantra represents the face of the Lord:
tasya tasya tanuryA pU-
stasyAmuShati yena saH |
sa tatpuruShavaktrakaH ||
The aghora mahAmantra represents the very heart of the Supreme:
so.asya ghoraH shivo yataH |
vAmadeva mantra represents the guhya desha of the Lord:
drahasyashcha svabhAvataH |
vAmaM dhAma paraM guhyaM
yasyAsau vAmaguhyakaH ||
The mUrti or form of the Lord is associated with the sadyojAta mantra:
Sadyo.aNUnAM mUrtayaG saMbhavanti
yasyecChAtastena sadyo.abhidhAnaH |
sadyo mUrtIryoginAM vA vidhatte
sadyomUrtiH kR^ityashaighryAnna mUrteh ||
The verses are self-explanatory and aid us in understanding the tattva behind the pancha brahma mahAmantras.