By chanting the holy names Krsna and Hari, one is certainly liberated from sinful activities, such as killing cows or insulting brahmanas and Vaisnavas. It is most sinful to kill cows and insult brahmanas and Vaisnavas. The karma incurred by such activity is very great, but one can immediately nullify all this karma by surrendering to Lord Krsna and chanting His holy name. After being released from one's sinful reactions (karma), one becomes eager to serve the Lord. This is the test. Since the Mohammedan governor was immediately purified in the presence of Sri Caitanya Mahaprabhu, he could utter the names of Krsna and Hari. Consequently he was anxious to render some service, and the Lord, anxious to fulfill his desires, immediately had the devotee Mukunda Datta inform the governor that there was some service to render.