One cannot come to America without proper visa. So how you can go to the other planet without proper visa? So they do not think. That is, therefore, asuras, demons. They are simply thinking that they are perfect, they can do everything. That is not possible. That is not possible.
Therefore a devotee knows how to do things. He knows not automatically, but he learns from the spiritual master, the representative of God. Then he becomes perfect. Otherwise asura. Na śaucaṁ nāpi cācāraḥ (BG 16.7). The asuras, they do not know what is cleanliness, what is proper behavior. That is the asuric quality. So we have explained: by asuric quality we remain conditioned with this material world. But daivī qual . . . by divine quality, we can become free from this material bondage and go back to home, back to Godhead. So these things are very elaborately explained in this chapter, Sixteenth Chapter. So let us know who is demon and who is divine.