Receive the Penitent
Instruct the catechumens in the elements of religion, and then baptize them. Eschew the antheistical heretics, who are past repentance, and separate them from the faithful, and excommunicate them from the Church of God, and charge the faithful to abstain entirely from them, and not to partake with them either in sermons or prayers: for these are those that are enemies to the Church, and lay snares for it; who corrupt the flock, and defile the heritage of Christ, pretenders only to wisdom, and the vilest of men;
They (unrepentant and heretics) are void of the Holy Spirit, which always continues with the faithful.
For the Holy Spirit always abides with those that are possessed of it, so long as they are worthy; and those from whom it is departed, it leaves them desolate, and exposed to the wicked spirit. Now every man is filled either with the holy or with the unclean spirit; and it is not possible to avoid the one or the other, unless they can receive opposite spirits. For the Comforter hates every lie, and the devil hates all truth. But every one that is baptized agreeably to the truth is separated from the diabolical spirit, and is under the Holy Spirit; and the Holy Spirit remains with him so long as he is doing good, and fills him with wisdom and understanding, and suffers not the wicked spirit to approach him, but watches over his goings.