mudhalAvAr mUvarE ammUvar uLLum
mudhalAvAn mUri nIr vaNNan - mudhalAya
nallAn aruL allAl nAma nIr vaiyagaththu
pallAr aruLum pazhudhu 

Meaning:

mUvarE 				- Brahma, Vishnu and Shiva
mudhalAvAr 			- are primary devatas.
ammUvaruLLum 			- Amongst these three,
mUri nIr vaNNan 		- He who has the color of the vast ocean
mudhalAvAn 			- is the cause of all.
aruL allAl 			- Other than the grace of
mudhalAya 			- One who is the cause of everything
nallAn 				- and One who is always helpful,
vaiyagaththu 			- in this world surrounded by
nAma nIr 			- the well known ocean,
aruLum 				- the grace
pallAr 				- of others
pazhudhu 			- is useless.

Vyakhyana Saram:
You are saying that He is the primary; but in this world, one sees that other devatas are seeked by many and that these devatas give them what they want; Azhvar replies - These are all against the Vedas; what I am saying is in line with what the Vedas say.