Sometimes they possess men in order to act through them, sometimes they take birth in a human body. When their use in the play is over, they will either change or disappear or no longer seek to intervene in the earth-play.Sri Aurobindo
Letters of Sri Aurobindo
Volume I - Part 5
Fragment ID: 10600
The Asuras and Rakshasas etc. do not belong to the earth, but to supraphysical worlds; but they act upon the earth life and dispute the control of human life and character and action with the Gods. They are the Powers of Darkness combating the Powers of Light.
Sometimes they possess men in order to act through them, sometimes they take birth in a human body. When their use in the play is over, they will either change or disappear or no longer seek to intervene in the earth-play.