The wisest of the early Fathers sometimes differed widely from each other in their methods; some were denunciatory, others were even too ready to excuse. The great African controversialist, Tertullian, was unsparing in his anathemas, not only against heathen customs, which were vile indeed, but against the teachings of the noblest philosophy. He had witnessed the former; he had not candidly studied the latter. With a blind zeal, which has too often been witnessed in the history of good causes, he denounced Plato, Aristotle, and even Socrates with a violence which marred the character of so great a man. On the other hand, Justin Martyr and Clement of Alexandria were perhaps excessively broad. Of two noted Alexandrines, Archdeacon Farrar says: "They were philosophers in spirit; they could enforce respect by their learning and their large, rounded sympathy, where rhetorical denunciation and ecclesiastical anathemas would only have been listened to with a frown of anger, or a look of disdain. Pagan youths would have listened to Clement when he spoke of Plato as 'the truly noble and half-inspired,' while they would have looked on Tertullian as an ignorant railer, who could say nothing better of Socrates than to call him the 'Attic buffoon,' and of Aristotle than to characterize him as the 'miserable Aristotle.'"

Tatian and Hermes also looked upon Greek philosophy as an invention of the devil. Irenæus was more discriminating. He opposed the broad and lax charity of the Alexandrines, but he read the Greek philosophy, and when called to the bishopric of Lyons, he set himself to the study of the Gallic Druidism, believing that a special adaptation would be called for in that remote mission field.[30] Basil was an earnest advocate of the Greek philosophy as giving a broader character to Christian education.

There were among the Fathers many different types of men, some philosophically inclined, others better able to use practical arguments. Some were more successful in appealing to the signs of the times, the clear evidences of that corruption and decay to which heathenism had led. They pointed to the degradation of women, the prevalence of vice, the inordinate indulgence in pleasures, the love of excitement, the cruel frenzy of the gladiatorial shows, the unrest and pessimism and despair of all society. One of the most remarkable appeals of this kind is found in a letter of Cyprian to his friend Donatus. "He bids him seat himself in fancy on some mountain top and gaze down upon what he has abandoned (for he is a Christian), on the roads blocked by brigands, the sea beset by pirates, the camps desolated by the horrors of many wars, on the world reeking with bloodshed, and the guilt which, in proportion to its magnitude, was extolled as a glory. Then, if he would turn his gaze to the cities, he would behold a sight more gloomy than all solitudes. In the gladiatorial games men were fattened for mutual slaughter, and publicly murdered to delight the mob. Even innocent men were urged to fight in public with wild beasts, while their mothers and sisters paid large sums to witness the spectacle. In the theatres parricide and infanticide were dealt with before mixed audiences, and all pollution and crimes were made to claim reverence because presented under the guise of religious mythology. In the homes was equal corruption; in the forum bribery and intrigue ran rife; justice was subverted, and innocence was condemned to prison, torture, and death. Luxury destroyed character, and wealth became an idol and a curse."[31] Arguments of this kind were ready enough to hand whenever Christian teachers were disposed to use them, and their descriptions found a real corroboration in society as it actually appeared on every hand. None could question the counts in the indictment.

3. While the Christian Fathers and the missionaries differed in their estimates of heathenism, and in their methods of dealing with it, one thing was recognized by all whom we designate as the great leaders, namely, the imperative necessity of a thorough knowledge of it. They understood both the low superstition of the masses and the loftier teaching of the philosophers. On the other hand, they had the same estimate of the incomparable Gospel of Christ that we have; they realized that it was the wisdom of God and the power of God unto salvation as clearly as the best of us, but they did not claim that it was to be preached blindly and without adaptation. The verities of the New Testament teachings, the transforming power of the Holy Ghost, the necessity for a new birth and for the preternatural influence of grace, both in regeneration and in sanctification, were as strongly maintained as they have ever been in any age of the Church; but the Fathers were careful to know whether they were casting the good seed upon stony places, or into good ground where it would spring up and bear fruit. The liberal education of that day was, in fact, an education along the old lines of heathen philosophy, poetry, history, and rhetoric; and a broad training was valued as highly as it has been in any subsequent period. It was thoroughly understood that disciplined intellect, other things being equal, may expect a degree of influence which can never fall to the lot of ignorance, however sanctified its spirit. There has never been a stronger type of men than the Christian Fathers. They were learned men, for the age in which they lived, and their learning had special adaptations to the work assigned them. Many of them, like Cyprian, Clement, Hilary, Martin of Tours, had been born and educated in heathenism; while others, like Basil, Gregory, Origen, Athanasius, Jerome, and Augustine, though born under Gospel influences, studied heathen philosophy and poetry at the instance of their Christian parents.

4. Some of the leaders familiarized themselves with the speculations of the day, not merely for the sake of a wider range of knowledge, but that they might the more successfully refute the assailants of the faith, many of whom were men of great power. They were fully aware that it behooved them to know their ground, for their opponents studied the points of comparison carefully. The infidel Celsus studied Christianity and its relation to the Old Testament histories and prophecies, and he armed himself with equal assiduity with all the choicest weapons drawn from Greek philosophy. How was such a man to be met? His able attack on Christianity remained fifty years unanswered. To reply adequately was not an easy task. Doubtless there were many, then as now, who thought that the most comfortable way of dealing with such things was to let them alone. But a wiser policy prevailed. Origen was requested to prepare an answer, and, although such work was not congenial to him, he did so because he felt that the cause of the truth demanded it. His reply outlived the attack which it was designed to meet, and in all subsequent ages it has been a bulwark of defence.[32]

Origen was not of a pugnacious spirit—it was well that he was not—but with wide and thorough preparation he summoned all his energies to meet the foe. Archdeacon Farrar says of him, that he had been trained in the whole circle of science. He could argue with the pupils of Plato, or those of Zeno, on equal terms, and he deems it fortunate that one who was called, as he was, to be a teacher at Alexandria, where men of all nations and all creeds met, had a cosmopolitan training and a cosmopolitan spirit.

No less resolute was the effort of Ambrose in resisting the errors of Arianism, and he also adapted himself to the work in hand. He had not been afraid of Platonism. On the other hand, we are told that Plato, next to his Bible, constituted a part of his daily reading, and that, too, in the period of his ripest Christian experience, and when he carried his studies and his prayers far into the hours of the night. But in dealing with Arianism he needed a special understanding of all its intricacies, and when among its advocates and supporters he encountered a powerful empress as well as her ablest advocates, he had need of all the powers within him—that power of moral earnestness which had led him to give all his property to the poor—that power of strong faith, which prepared him, if need be, to lay down his life—the power of a disciplined intellect, and a thorough knowledge of the whole issue.

5. The early Fathers not only studied the heathen philosophies of Plato and Aristotle, but they learned to employ them, and their successors continued to employ them, even to the Middle Ages, and the period of the Reformation. As an intellectual framework, under which truth should be presented in logical order, it became a strong resource of the early Christian teachers. Let me refer you on this point to the clear statements of Professor Shedd.[33] He has well said that "when Christianity was revealed in its last and beautiful form by the incarnation of the Eternal World, it found the human mind already occupied by human philosophy. Educated men were Platonists, or Stoics, or Epicureans. During the age of Apologetics, which extended from the end of the apostolic age to the death of Origen, the Church was called to grapple with these systems, to know as far as possible what they contained, and to discriminately treat their contents, rejecting some things, utilizing others." "We shall see," he continues, "that Plato, Aristotle, and Cicero exerted more influence than all other philosophic minds united upon the greatest of Christian Fathers, upon the greatest of the School men, and upon the greatest of the theologians of the Reformation, Calvin and Melancthon; and if we look at European philosophy, as it has been unfolded in England, Germany, and France, we can perceive that all the modern philosophic schools have discussed the principles of human reason in very much the same manner in which Plato and Aristotle discussed them twenty-two centuries ago."

I need hardly say, in closing, that it is not necessary to borrow from the heathen systems of to-day as extensively as the Fathers did from the systems of Greece and Rome, and it would be discordant with good taste to illustrate our sermons with quotations from the Hindu poets as lavishly as good Jeremy Taylor graced his discourses with gems from the poets of Greece. But I think that we may so far heed the wise examples furnished by Church history as to face the false systems of our time with a candid and discriminating spirit, and by a more adequate knowledge to disenchant the bugbears with which their apologists would alarm the Church.

We are entering upon the broadest and most momentous struggle with heathen error that the world has ever witnessed. Again, in this later age, philosophy and multiform speculation are becoming the handmaids of Hindu pantheism and Buddhist occultism, as well as of Christian truth. The resources of the East and the West are combined and subsidized by the enemy as well as by the Church. As in old Rome and Alexandria, so now in London and Calcutta all currents of human thought flow together, and truth is in full grapple with error. It is no time to be idle or to take refuge in pious ignorance, much less to fear heathen systems as so many haunted houses which superstitious people dare not enter—as if the Gospel were not as potent a talisman now as it was ages ago. Let us fearlessly enter these abodes of darkness, throw open the shutters, and let in the light of day, and the hobgoblins will flee. Let us explore every dark recess, winnow out the miasma and the mildew with the pure air of heaven, and the Sun of Righteousness shall fill the world.