Only a person in full knowledge can understand the activities of a person in Krsna consciousness. Because the person in Krsna consciousness is devoid of all kinds of sense-gratificatory propensities, it is to be understood that he has burned up the reactions of his work by perfect knowledge of his constitutional position as the eternal servitor of the Supreme Personality of Godhead. He is actually learned who has attained to such perfection of knowledge. Development of this knowledge of the eternal servitorship of the Lord is compared to fire. Such a fire, once kindled, can burn up all kinds of reactions to work.