Glossa Ordinaria

But the angels. And truly those are not to be imitated who falsely say that Jesus is not true God, but a man begotten of both sexes. For if he did not spare the angels who sinned, neither will he spare men who grow proud. They did not keep their own principality. So too men, who do not keep the principality by which through the grace of adoption they were made sons of God. But they abandon their dwelling, that is, the unity of the Church in which they were reborn, or the seats of the heavenly kingdom which they were to receive if they kept the faith; and he will condemn them gravely before the judgment, and more gravely in the universal judgment. With eternal chains. That is, with pride and an impenitent heart. Or the divine sentence which will confine them forever Or the chain is the desire of the lowest things, bound by which they cannot return to higher things.