Illayaraja - At his best !!

My carnatic-music trained brother sent me the link to this song by Illayaraja. The song is composed by 3 notes SA-RE-GA in carnatic & C,D,E in western. Its a tough one to compose , given the limitations ( to be sung only in the rising note ).

I should admit i couldn't figure out the nuances.

I liked the rhythm , nevertheless.