Performing the duty prescribed by nature, one does not incur sin. O son of Kunti! one should not abandon a natural duty though tainted with evil; for all actions are enveloped by evil, as fire by smoke. One who is self-restrained, whose understanding is unattached everywhere, from whom affections have departed, obtains the supreme perfection of freedom from action by renunciation. Learn from me, only in brief, O son of Kunti! how one who has obtained perfection attains the Brahman, which is the highest culmination of knowledge.