The heathen converts of the latter class had much more to learn, before they could become confirmed Christians, than their more enlightened brethren who had been prepared by intercourse with Jews. They were equally ready in admitting the evidence of miracles, but not equally clear as to the object for which those miracles were wrought. When Paul and Barnabas restored the cripple at Lystra, the priests and people could scarcely be restrained from offering sacrifice to them as gods, even after the Apostles had explained to them the true nature of Deity. Yet the true religion, being patiently and faithfully taught, was, at length, fully understood and received; and the three classes of converts, Jews, proselytes, and pagans, were made one in Christ; holding, in undisturbed harmony of conviction, the essential doctrines of the strict Unity of Jehovah, the divine authority of Jesus Christ, and consequently, the divine origin of the Gospel he brought. This unity of the faith seems to have been first broken in upon by the introduction of a fourth class of converts, who, by incorporating their former philosophical doctrines with the new theology they had embraced, originated the first heresy. There had been disputes, it is true, in the church; but not concerning matters of faith. In these disputes the Apostles themselves had been not only involved, but actually opposed to each other. These questions related to the fancied necessity of the adoption by the Gentiles of the forms of the Jewish law: questions of great importance to the Jews, as affecting their views of the ultimate design of Christianity; to the Gentiles, as involving their spiritual liberties; and to us and the Christian world at large, as throwing light on the transactions of the primitive times, and as having originated some of the Epistles of Paul. But they bore no relation to the essential doctrines, which were held free from corruption, controversy, or even doubt, till some converts from the philosophical sect of the Gnostics introduced, within twenty years after the death of Christ, the first taint of that corruption from which the true faith has never since been freed.