" For by the just judgment of God it was decreed, and, as it were, confirmed by writing, that, since man had sinned, he should not henceforth of himself have the power to avoid sin or the punishment of sin; for the spirit is out-going and not returning (est enim spiritus vadens et non rediens); and he who sins ought not to escape with impunity, unless pity spare the sinner, and deliver and restore him. Wherefore we ought not to believe that, on account of this writing, there can be found any justice on the part of the devil in his tormenting man. In fine, as there is never any injustice in a good angel, so in an evil angel there can be no justice at all. There was no reason, therefore, as respects the devil, why God should not make use of his own power against him for the liberation of man. "

― Anselm of Canterbury , Cur Deus Homo