Swami Desikan composed a
series ofSrI Sookthis revered as ChillaRai
Rahasyams . They are written in MaNipravALa Format (Sanskritized Tamil)
. The first part of these ChillaRai Rahasyams
contains 17 rahasyams (esoteric
upadEsams
in contrast to Sadhasyams, which are taught in public ) starting
from SampradhAya Parisuddhi to Saara DhIpam