Mark 9:40

(Vict. Ant. e Cat. in Marc.) Or else, this is said of those who believe on Him, but nevertheless do not follow Him from the looseness of their lives. Again, it is said of devils, who try to separate all from God, and to disperse His congregation.

That both, therefore, should be true, as both are true,—both the declaration, that "he that is not with me is against me, and he that gathereth not with me scattereth abroad;" and also the injunction, "Forbid him not; for he that is not against you is for you,"—what must we understand, except that the man was to be confirmed in his veneration for that mighty Name, in respect of which he was not against the Church, but for it; and yet he was to be blamed for separating himself from the Church, whereby his gathering became a scattering; and if it should have so happened that he sought union with the Church, he should not have received what he already possessed, but be made to set right the points wherein he had gone astray?

But, inasmuch as they had prohibited the man from doing a thing in which, so far forth, he was really with them, the Lord said to them, "Forbid him not." For what they ought to have forbidden was what was outside their fellowship, so that they might bring him over to the unity of the Church, and not a thing like this, in which he was at one with them, that is to say, so far as he commended the name of their Master and Lord in the casting out of devils. And this is the principle on which the Catholic Church acts, not condemning common sacraments among heretics; for in these they are with us, and they are not against us. But she condemns and forbids division and separation, or any sentiment adverse to peace and truth. For therein they are against us, just because they are not with us in that, and because, not gathering with us, they are consequently scattering.