Nicene and Post-Nicene Fathers, Ser. II, Vol. XI:
The Works of John Cassian.: Chapter IX. An objection stating that the fall of the devil took its origin from the deception of God.

Chapter IX.

An objection stating that the fall of the devil took its origin from the deception of God.

Germanus: Up till now we used to believe that the reason and commencement of the ruin and fall of the devil, in which he was cast out from his heavenly estate, was more particularly envy, when in his spiteful subtlety he deceived Adam and Eve.