This divine energy of Mine, consisting of the three modes of material nature, is difficult to overcome. But those who have surrendered unto Me can easily cross beyond it. To surrender to Krsna means to surrender to His devotees also, for no one can be a proper servant of Krsna unless he is a proper servant of a devotee. Chadiya vaisnava-seva nistara payeche keba: without serving a servant of Krsna, one cannot be elevated to being a servant of Krsna Himself. Therefore mother Parvati spoke to Citraketu exactly like a mother who says to her naughty child, My dear child, I am punishing you so that you wont do anything like this again. This tendency of a mother to punish her child is found even in mother Yasoda, who became the mother of the Supreme Personality of Godhead. Mother Yasoda punished Krsna by binding Him and showing Him a stick. Thus it is the duty of a mother to chastise her beloved son, even in the case of the Supreme Lord. It is to be understood that mother Durga was justified in punishing Citraketu. This punishment was a boon to Citraketu because after taking birth as the demon Vrtrasura, he was promoted directly to Vaikuntha.