In the next place, that he may have the appearance of knowing still more than he has yet mentioned, he says, agreeably to his usual custom, that “there are others who have wickedly invented some being as their teacher and demon, and who wallow about in a great darkness, more unholy and accursed than that of the companions of the Egyptian Antinous.” And he seems to me, indeed, in touching on these matters, to say with a certain degree of truth, that there are certain others who have wickedly invented another demon, and who have found him to be their lord, as they wallow about in the great darkness of their ignorance.
With respect, however, to Antinous, who is compared with our Jesus, we shall not repeat what we have already said in the preceding pages. “Moreover,” he continues, “these persons utter against one another dreadful blasphemies, saying all manner of things shameful to be spoken; nor will they yield in the slightest point for the sake of harmony, hating each other with a perfect hatred.” Now, in answer to this, we have already said that in philosophy and medicine sects are to be found warring against sects.
We, however, who are followers of the word of Jesus, and have exercised ourselves in thinking, and saying, and doing what is in harmony with His words, “when reviled, bless; being persecuted, we suffer it; being defamed, we entreat;” and we would not utter “all manner of things shameful to be spoken” against those who have adopted different opinions from ours, but, if possible, use every exertion to raise them to a better condition through adherence to the Creator alone, and lead them to perform every act as those who will (one day) be judged.
And if those who hold different opinions will not be convinced, we observe the injunction laid down for the treatment of such: “A man that is a heretic, after the first and second admonition, reject, knowing that he that is such is subverted, and sins, being condemned of himself.” Moreover, we who know the maxim, “Blessed are the peacemakers,” and this also, “Blessed are the meek,” would not regard with hatred the corrupters of Christianity, nor term those who had fallen into error Circes and flattering deceivers.
Source: Against Celsus (New Advent)