No such thing as heresy existed among the religions of antiquity, because they had reference only to moral conduct and public worship. When metaphysics became connected with Christianity, controversy prevailed; and from controversy arose different parties, as in the schools of philosophy. It was impossible that metaphysics should not mingle the uncertainties essential to their nature with the faith due to Jesus Christ. He had Himself written nothing; and His incarnation was a problem which the new Christians, whom He had not Himself inspired, solved in many different ways. "Each," as St. Paul expressly observes, "had his peculiar party; some were for Apollos, others for Cephas." Christians in general, for a long time, assumed the name of Nazarenes, and even the Gentiles gave them no other appellations during the two first centuries. But there soon arose a particular school of Nazarenes, who believed a gospel different from the four canonical ones. It has even been pretended that this gospel differed only very slightly from that of St. Matthew, and was in fact anterior to it. St. Epiphanius and St. Jerome place the Nazarenes in the cradle of Christianity. Those who considered themselves as knowing more than the rest, took the denomination of gnostics, "knowers"; and this denomination was for a long time so honorable that St. Clement of Alexandria, in his "_Stromata_" always calls the good Christians true gnostics. "Happy are they who have entered into the gnostic holiness! He who deserves the name of gnostic resists seducers and gives to every one that asks." The fifth and sixth books of the "_Stromata_" turn entirely upon the perfection of gnosticism. The Ebionites existed incontestably in the time of the apostles. That name, which signifies "poor," was intended to express how dear to them was the poverty in which Jesus was born. Cerinthus was equally ancient. The "Apocalypse" of St. John was attributed to him. It is even thought that St. Paul and he had violent disputes with each other. It seems to our weak understandings very natural to expect from the first disciples a solemn declaration, a complete and unalterable profession of faith, which might terminate all past, and preclude any future quarrels; but God permitted it not so to be. The creed called the "Apostles' Creed," which is short, and in which are not to be found the consubstantiality, the word trinity, or the seven sacraments, did not make its appearance before the time of St. Jerome, St. Augustine, and the celebrated priest Rufinus. It was by this priest, the enemy of St. Jerome, that we are told it was compiled. Heresies had had time to multiply, and more than fifty were enumerated as existing in the fifth century.