Ante-Nicene Fathers, Vol I:
JUSTIN MARTYR: IV.

IV.

Expounding the reason of the incessant plotting of the devil against us, he declares: Before the advent of the Lord, the devil did not so plainly know the measure of his own punishment, inasmuch as the divine prophets had but enigmatically announced it; as, for instance, Isaiah, who in the person of the Assyrian tragically revealed the course to be followed against the devil. But when the Lord appeared, and the devil clearly understood that eternal fire was laid up and prepared for him and his angels, he then began to plot without ceasing against the faithful, being desirous to have many companions in his apostasy, that he might not by himself endure the shame of condemnation, comforting himself by this cold and malicious consolation.—From the writings of John of Antioch.