Anti-pelagian Writings by St. Augustine
Chapter 27.--The Answer.
Wherefore we most wholesomely confess what we most correctly believe, that the God and Lord of all things, who in His strength created all things good, and foreknew that evil things would arise out of good, and knew that it pertained to His most omnipotent goodness even to do good out of evil things rather than not to allow evil things to be at all, so ordained the life of angels and men that in it He might first of all show what their free will was capable of, and then what the kindness of His grace and the judgment of His righteousness was capable of. Finally, certain angels, of whom the chief is he who is called the devil, became by free will outcasts from the Lord God. Yet although they fled from His goodness, wherein they had been blessed, they could not flee from His judgment, by which they were made most wretched. Others, however, by the same free will stood fast in the truth, and merited the knowledge of that most certain truth that they should never fall. For if from the Holy Scriptures we have been able to attain the knowledge that none of the holy angels shall fall evermore, how much more have they themselves attained this knowledge by the truth more sublimely revealed to them! Because to us is promised a blessed life without end, and equality with the angels, from which promise we are certified that when after judgment we shall have come to that life, we shall not fall from it; but if the angels are ignorant of this truth concerning themselves, we shall not be their equals, but more blessed than they. But the Truth has promised us equality with them. It is certain, then, that they have known this by sight, which we have known by faith, to wit, that there shall be now no more any fall of any holy angel. But the devil and his angels, although they were blessed before they fell, and did not know that they should fall unto misery, -- there was still something which might be added to their blessedness, if by free will they had stood in the truth, until they should receive that fulness of the highest blessing as the reward of that continuance; that is, that by the great abundance of the love of God, given by the Holy Spirit, they should absolutely not be able to fall any more, and that they should know this with complete certainty concerning themselves. They had not this plenitude of blessedness; but since they were ignorant of their future misery, they enjoyed a blessedness which was less, indeed, but still without any defect. For if they had known their future fall and eternal punishment, they certainly could not have been blessed; since the fear of so great an evil as this would compel them even then to be miserable.