Of Apostasy

Of Apostasy — St. Thomas Aquinas asks: Whether apostasy pertains to unbelief?; Whether a prince forfeits his dominion over his subjects, on account of apostasy from the faith, so that they no longer owe him allegiance?.

We must now consider apostasy: about which there are two points of inquiry:

Article 1: Whether apostasy pertains to unbelief?

It is written (Jn. 6:67): "Many of his disciples went back," i.e. apostatized, of whom Our Lord had said previously (Jn. 6:65): "There are some of you that believe not." Therefore apostasy pertains to unbelief.

Apostasy denotes a backsliding from God. This may happen in various ways according to the different kinds of union between man and God. For, in the first place, man is united to God by faith; secondly, by having his will duly submissive in obeying His commandments; thirdly, by certain special things pertaining to supererogation such as the religious life, the clerical state, or Holy Orders. Now if that which follows be removed, that which precedes, remains, but the converse does not hold. Accordingly a man may apostatize from God, by withdrawing from the religious life to which he was bound by profession, or from the Holy Order which he had received: and this is called "apostasy from religious life" or "Orders." A man may also apostatize from God, by rebelling in his mind against the Divine commandments: and though man may apostatize in both the above ways, he may still remain united to God by faith.

But if he give up the faith, then he seems to turn away from God altogether: and consequently, apostasy simply and absolutely is that whereby a man withdraws from the faith, and is called "apostasy of perfidy." In this way apostasy, simply so called, pertains to unbelief.

Article 2: Whether a prince forfeits his dominion over his subjects, on account of apostasy from the faith, so that they no longer owe him allegiance?

Gregory VII says (Council, Roman V): "Holding to the institutions of our holy predecessors, we, by our apostolic authority, absolve from their oath those who through loyalty or through the sacred bond of an oath owe allegiance to excommunicated persons: and we absolutely forbid them to continue their allegiance to such persons, until these shall have made amends." Now apostates from the faith, like heretics, are excommunicated, according to the Decretal [*Extra, De Haereticis, cap. Ad abolendam]. Therefore princes should not be obeyed when they have apostatized from the faith.

As stated above (), unbelief, in itself, is not inconsistent with dominion, since dominion is a device of the law of nations which is a human law: whereas the distinction between believers and unbelievers is of Divine right, which does not annul human right. Nevertheless a man who sins by unbelief may be sentenced to the loss of his right of dominion, as also, sometimes, on account of other sins.

Now it is not within the competency of the Church to punish unbelief in those who have never received the faith, according to the saying of the Apostle (1 Cor. 5:12): "What have I to do to judge them that are without?" She can, however, pass sentence of punishment on the unbelief of those who have received the faith: and it is fitting that they should be punished by being deprived of the allegiance of their subjects: for this same allegiance might conduce to great corruption of the faith, since, as was stated above (), "a man that is an apostate . . . with a wicked heart deviseth evil, and . . . soweth discord," in order to sever others from the faith. Consequently, as soon as sentence of excommunication is passed on a man on account of apostasy from the faith, his subjects are "ipso facto" absolved from his authority and from the oath of allegiance whereby they were bound to him.