Highlights from Nampil̤l̤ai's Vyākhyānam as Documented by Vadakkuth Thiruvīdhip Pil̤l̤ai
Ām vaṇṇam ... - Āzhvār sung Sarvēśvara who is difficult to be known by anyone as having a particular nature. Even Vedha returned, being unable to speak about Him [His qualities] as said in Taittirīya Upaniṣad "yatho vāco nivartante" (the speech returned).