From which it follows, that in the case of every creature it is a result of his own works and movements, that those powers which appear either to hold sway over others or to exercise power or dominion, have been preferred to and placed over those whom they are said to govern or exercise power over, and not in consequence of a peculiar privilege inherent in their constitutions, but on account of merit.
…Now it is certain that by the dragon is understood the devil himself. If then they are called opposing powers, and are said to have been once without stain, while spotless purity exists in the essential being of none save the Father, Son, and Holy Spirit, but is an accidental quality in every created thing; and since that which is accidental may also fall away, and since those opposite powers once were spotless, and were once among those which still remain unstained, it is evident from all this that no one is pure either by essence or nature, and that no one was by nature polluted. And the consequence of this is, that it lies within ourselves and in our own actions to possess either happiness or holiness; or by sloth and negligence to fall from happiness into wickedness and ruin, to such a degree that, through too great proficiency, so to speak, in wickedness (if a man be guilty of so great neglect), he may descend even to that state in which he will be changed into what is called an “opposing power.”
Origen
On First Principles, Book I
Chapter V