“Human life is distinguished from animal life due to its heavy responsibilities. Those who are cognizant of these responsibilities and who work in that spirit are called suras (godly persons), and those who are neglectful of these responsibilities or who have no information of them are called asuras (demons). Throughout the universe there are only these two types of human being.” (Shrila Prabhupada, Shri Ishopanishad, 3 Purport)