16.21 Those three which constitute the 'gateway of this hell' in the shape of demoniac nature, and are destructive of the self (Atman) - are known as desire, wrath and greed. The nature of these has already been explained. 'Gateway' (Dvara) means the path, the cause. Therefore, one should renounce these three. Therefore, since they constitute the cause of the extremely dreadful Naraka, one should wholly renounce this triad - desire, wrath and greed.