PURPORT

The five mantras mentioned in this connection are as follows: (1) Purusa, (2) Aghora, (3) Sadyojata, (4) Vamadeva, and (5) Isana. These five mantras are within the category of thirty-eight special Vedic mantras chanted by Lord Siva, who is therefore celebrated as Siva or Mahadeva. Another reason why Lord Siva is called Siva, which means "all-auspicious," is that he is self-illuminated, exactly like Lord Visnu, who is the Paramatma. Because Lord Siva is directly an incarnation of Lord Visnu, he is situated as Lord Visnu's direct representative. This fact is corroborated by a Vedic mantra: patim visvasyatmesvaram sasvatam sivam acyutam. The Supersoul is called by many names, of which Mahesvara, Siva and Acyuta are especially mentioned.