The Divine Institutes

But since many heresies have existed, and the people of God have been rent into divisions at the instigation of demons, the truth must be briefly marked out by us, and placed in its own peculiar dwelling-place, that if any one shall desire to draw the water of life, he may not be borne to broken cisterns which hold no water, but may know the abundant fountain of God, watered by which he may enjoy perpetual light. Before all things, it is befitting that we should know both that He Himself and His ambassadors foretold that there must be numerous sects and heresies, which would break the unity of the sacred body; and that they admonished us to be on our guard with the greatest prudence, lest we should at any time fall into the snares and deceits of that adversary of ours, with whom God has willed that we should contend. Then that He gave us sure commands, which we ought always to treasure in our minds; for many, forgetting them, and abandoning the heavenly road, have made for themselves devious paths amidst windings and precipices, by which they might lead away the incautious and simple part of the people to the darkness of death: I will explain how this happened. There were some of our religion whose faith was less established, or who were less learned or less cautious, who rent the unity and divided the Church. But they whose faith was unsettled, when they pretended that they knew and worshipped God, aiming at the increase of their wealth and honour, aspired to the highest sacerdotal power; and when overcome by others more powerful, preferred to secede with their supporters, than to endure those set over them, over whom they themselves before desired to be set.

But some, not sufficiently instructed in heavenly learning, when they were unable to reply to the accusers of the truth, who objected that it was either impossible or inconsistent that God should be shut up in the womb of a woman, and that the Majesty of heaven could not be reduced to such weakness as to become an object of contempt and derision, a reproach and mockery to men; lastly, that He should even endure tortures, and be affixed to the accursed cross; and when they could defend and refute all these things neither by talent nor learning, for they did not thoroughly perceive their force and meaning, they were perverted from the right path, and corrupted the sacred writings, so that they composed for themselves a new doctrine without any root and stability. But some, enticed by the prediction of false prophets, concerning whom both the true prophets and he himself had foretold, fell away from the knowledge of God, and left the true tradition. But all of these, ensnared by frauds of demons, which they ought to have foreseen and guarded against, by their carelessness lost the name and worship of God. For when they are called Phrygians, or Novatians, or Valentinians, or Marcionites, or Anthropians, or Arians, or by any other name, they have ceased to be Christians, who have lost the name of Christ, and assumed human and external names. Therefore it is the Catholic Church alone which retains true worship.

This is the fountain of truth, this is the abode of the faith, this is the temple of God; into which if any one shall not enter, or from which if any shall go out, he is estranged from the hope of life and eternal salvation. No one ought to flatter himself with persevering strife. For the contest is respecting life and salvation, which, unless it is carefully and diligently kept in view, will be lost and extinguished. But, however, because all the separate assemblies of heretics call themselves Christians in preference to others, and think that theirs is the Catholic Church, it must be known that the true Catholic Church is that in which there is confession and repentance, which treats in a wholesome manner the sins and wounds to which the weakness of the flesh is liable. I have related these things in the meanwhile for the sake of admonition, that no one who desires to avoid error may be entangled in a greater error, while he is ignorant of the secret of the truth. Afterwards, in a particular and separate work, we will more fully and copiously contend against all divisions of falsehoods. It follows that, since we have spoken sufficiently on the subject of true religion and wisdom, we discuss the subject of justice in the next book.