In the Bhagavad-gita we understand from the 16th Chapter that when a living entity becomes envious of Krishna, he is put into the darkest region of material existence, exactly in the same way as when a citizen is disobedient, lawbreaker, he is put into the prison cells. So this is nature's way beginning from Krishna, and one has to undergo such stringent regulative principles of material nature in such disobedient position.
Letter to Brahmananda, 25 November, 1969