The Death of Christ Voluntary. How the Mediator of Life Subdued the Mediator of Death. How the Devil Leads His Own to Despise the Death of Christ
18 Hence also the devil mocks those who are his own until this very day, to whom he presents himself as a false mediator, as though they would be cleansed or rather entangled and drowned by his rites, in that he very easily persuades the proud to ridicule and despise the death of Christ, from which the more he himself is estranged, the more is he believed by them to be the holier and more divine. Yet those who have remained with him are very few, since the nations acknowledge and with pious humility imbibe the price paid for themselves, and in trust upon it abandon their enemy, and gather together to their Redeemer.
For the devil does not know how the most excellent wisdom of God makes use of both his snares and his fury to bring about the salvation of His own faithful ones, beginning from the former end, which is the beginning of the spiritual creature, even to the latter end, which is the death of the body, and so “reaching from the one end to the other, mightily and sweetly ordering all things.” For wisdom “passes and goes through all things by reason of her pureness, and no defiled thing can fall into her.” And since the devil has nothing to do with the death of the flesh, whence comes his exceeding pride, a death of another kind is prepared in the eternal fire of hell, by which not only the spirits that have earthly, but also those who have aerial bodies, can be tormented.
But proud men, by whom Christ is despised, because He died, wherein He bought us with so great a price, both bring back the former death, and also men, to that miserable condition of nature, which is derived from the first sin, and will be cast down into the latter death with the devil. And they on this account preferred the devil to Christ, because the former cast them into that former death, whither he himself fell not through the difference of his nature, and whither on account of them Christ descended through His great mercy: and yet they do not hesitate to believe themselves better than the devils, and do not cease to assail and denounce them with every sort of malediction, while they know them at any rate to have nothing to do with the suffering of this kind of death, on account of which they despise Christ.
Neither will they take into account that the case may possibly be, that the Word of God, remaining in Himself, and in Himself in no way changeable, may yet, through the taking upon Him of a lower nature, be able to suffer somewhat of a lower kind, which the unclean spirit cannot suffer, because he has not an earthly body. And so, whereas they themselves are better than the devils, yet, because they bear a body of flesh, they can so die, as the devils certainly cannot die, who do not bear such a body.
They presume much on the deaths of their own sacrifices, which they do not perceive that they sacrifice to deceitful and proud spirits; or if they have come to perceive it, think their friendship to be of some good to themselves, treacherous and envious although they are, whose purpose is bent upon nothing else except to hinder our return.
Source: On the Holy Trinity (New Advent)