"A devotee travels all over the country, from door to door, preaching, 'Be Krsna conscious. Be a devotee of Lord Krsna. Don't spoil your life in simply fulfilling your animal propensities. Human life is meant for self-realization, or Krsna consciousness.' These are the preachings of a sadhu. He is not satisfied with his own liberation. He always thinks about others. He is the most compassionate personality towards all the fallen souls. One of his qualifications, therefore, is karunika, great mercy to the fallen souls. While engaged in preaching work, he has to meet with so many opposing elements, and therefore the sadhu, or devotee of the Lord, has to be very tolerant. Someone may ill-treat him because the conditioned souls are not prepared to receive the transcendental knowledge of devotional service. They do not like it; that is their disease. The sadhu has the thankless task of impressing upon them the importance of devotional service."