Meaning and Comments:
Oh nArAyaNa! At ArasANipAlai, You are looking joyously at the eastern direction with Your devi (nArAyaNatvam ramayA sametaH prAcIm diSamvIkshya muhuH prasannaH). aDiyEn wondered why You are intently looking at the east and are feeling joyous. aDiyEn recognized that there is a parama rahasyam behind Your act.
You are looking at the yUpastambham in the east, which is standing in tact over the four hundred and fifty (450) years in spite of all the changes that have taken place in the agrahAram during this long period of time. From Your perspective, it is a jaya stambham that is standing erect.
Courtesy: Sri Oppiliappan Koil Sri Varadachari Sadagopan