text: Kuiper calls Asuras a special group of gods in one of major Vedic theories of creation of the universe. Their role changes only during and after the earth, sky and living beings have been created. The sky world becomes that of Devas, the underworld becomes that of Asuras. The god  Indra is the embodiment of good and represents the Devas, while the dragon Vrtra is the embodiment of evil and an Asura. During this battle between good and evil, creation and destruction, some powerful Asuras side with the good and are called Devas, other powerful Asuras side with the evil and thereafter called Asuras. This is the first major dualism to emerge in the nature of everything in the Universe. Hale (1999), in his review, states that Kuiper theory on Asura is plausible but weak because the Vedas never call Vrtra (the central character) an Asura as the texts describe many other powerful beings. Secondly, Rig Veda never classifies Asura as "group of gods" states Hale, and this is a presumption of Kuiper.
  Many scholars describe Asuras to be "lords" with different specialized knowledge, magical powers and special abilities, which only later choose to deploy these for good, constructive reasons or for evil, destructive reasons. The former become known as Asura in the sense of Devas, the later as Asura in the sense of demons. Kuiper, Brown, Otto and others are in this school; however, none of them provide an explanation and how, when and why Asura came ultimately to mean demon. Asuras are non-believers of God and believe in their own powers.