Highlights from Nampiḷḷai's Vyākhyānam as documented by Vadakkuth Thiruvīdhip Piḷḷai
Pavaḷam ... - You, who are described as immutable in the Chāndogya Upaniṣad 3.14 'avākyanādharaḥ' (one who does not speak, ignores [in Paramapadham]), should smile, seeing Your devoted bhakta and revealing the inner bond through Your smile.
Nin pal nilā muttam - The alignment