I've got quite a feedback about the meaning of the word 'parimukha.m' - an
energetic letter inquiring whether I'm INSANE to render 'parimukha.m'
as 'the front of chest'. So I made further investigation of the Pali
Canon and found rather straightforward explanation:
537. "Parimukha.m sati.m upa.t.thapetvaa"ti tattha katamaa sati? Yaa
sati anussati pa.tissati pe sammaasati - aya.m vuccati "sati".
Aya.m sati upa.t.thitaa hoti supa.t.thitaa naasikagge vaa
mukhanimitte vaa. Tena vuccati "parimukha.m sati.m
upa.t.thapetvaa"ti.
Vibhangapali .252
In my inexperienced opinion Vibhanga seems to be one of the most
authoritative commentaries. In the passage above it clearly explains
'parimukha.m' as 'the tip of the nose (naasikagge) or mouth (mukha)
theme of concentration (nimitta)'. Buddhaghosa's commentaries seem to
be later.
I will greatly appreciate any further feedback regarding my (in)sanity
on this subject.