10 What, then, can be their deservings in the sight of God, on whom punishment are divinely denounced? Or how can such persons justify and sanctify the baptized, who, being enemies of the priests, strive to usurp things foreign and lawless, and by no right conceded to them? And yet we do not wonder that, in accordance with their wickedness, they do contend for them. For it is necessary that each one of them should maintain what they do; nor when vanquished will they easily yield, although they know that what they do is not lawful. That is to be wondered at, yea, rather to be indignant and aggrieved at, that Christians should support antichrists; and that prevaricators of the faith, and betrayers of the Church, should stand within in the Church itself. And these, although otherwise obstinate and unteachable, yet still at least confess this that all, whether heretics or schismatics, are without the Holy Ghost, and therefore can indeed baptize, but cannot confer the Holy Spirit; and at this very point they are held fast by us, inasmuch as we show that those who have not the Holy Ghost are not able to baptize at all.
Source: The Epistles of Cyprian (New Advent)