(i) The theists (Vaidikas) are those; who subscribe to the authority of the Vēdas;
(ii) The atheists (Nāstikas) are those who deny the existence of God. Denial can and ought to be only with respect to a thing, which forms the subject of such denial. That thing should be there, at least notionally, as ‘nothing’, as such, does not warrant denial, rather needs no denial.
This divine pāsuram appears in the first decade and first chapter of Nammāzhwār's Tiruvāymozhi. Our esteemed ācāryas unanimously explain that after having masterfully refuted the kudṛṣṭis—those who accept the authority of the Vedas but gravely misinterpret them—Nammāzhwār now turns his compassionate gaze toward the vedabāhyas, those who reject the Vedas