Firmilian of Caesarea, Letter to Cyprian 12
What does Stephanus really want — that the presence and sanctity of Christ be with those baptized among heretics? For if the Apostle is not lying when he says, "As many of you as were baptized into Christ have put on Christ" (Gal 3:27), then the one baptized there in Christ has put on Christ. But if he has put on Christ, he was able to receive the Holy Spirit, who is sent by Christ, and it is in vain that hands are laid on him when he comes to receive the Spirit — unless he puts on the Spirit from Christ in such a way that Christ is indeed present among heretics, but the Holy Spirit is not there.
Latin
Illud etiam quale est quod vult Stephanus, his qui apud haereticos baptizantur adesse praesentiam et sanctimoniam Christi? Nam, si non mentitur Apostolus dicens: Quotquot in Christo tincti estis, Christum induistis, utique qui illic in Christo baptizatus est induit Christum. Si autem induit Christum, accipere potuit et Spiritum sanctum, qui a Christo missus est, et frustra illi venienti ad accipiendum Spiritum manus imponitur; nisi si a Christo Spiritum induit ut apud haereticos sit quidem Christus, non sit autem illic Spiritus sanctus.