upatisthasva-just try to worship; purusam-the Supreme Person; bhagavantam-the Personality of Godhead; janardanam-who can kill all the enemies; sarva-bhuta-guha-vasam-living within the core of the heart of everyone; vasudevam-Vasudeva, Krsna, who is all-pervading and is the son of Vasudeva; jagat-gurum-the spiritual master and teacher of the whole world.