“The four arms of Lord Vishnu have different purposes. The hands holding a lotus flower and conchshell are meant for the devotees, whereas the other two hands, holding a disc and mace, or club, are meant for the demons. Actually all of the Lord's arms are auspicious, whether they are holding conchshells and flowers or clubs and discs.” (Shrila Prabhupada, Shrimad Bhagavatam, 4.24.45-46 Purport)