The theory of Baur and the Tübingen school (for so his followers came to be designated) was broadly conceived and ably advocated. In two vital respects it has had permanent influence. (1) Criticism, as already noted, has ceased to be mere debate about text and canon, and concerns itself to-day primarily with the history of Christian ideas as embodied in its primitive literature. Its problem is to relate the New Testament writings, together with all other cognate material, to the history of the developing religion from its earliest traceable form in the greater Pauline Epistles to where it emerges into the full light of day toward the close of the second century. (2) Again, Baur's outline of the process through which the nascent faith attained to full self-consciousness as a world-religion required correction rather than disproof. It was a grievous mistake to identify Peter, James, and John with those whom Paul bitterly denounces as Judaizing "false brethren," "super extra apostles," "ministers of Satan." It was a perversion of internal evidence to reject as post-Pauline the Epistles of the later period such as Philippians and Colossians, on the ground that Paul himself did not live to participate in the second crisis, the defence of his doctrine against perversion on the side of mystical, Hellenistic theosophy. The great Epistles written under the name of Paul from the period of his captivity are innocent of reference to the developed Gnostic systems of the second century. They antagonize only an incipient tendency in this direction.

But while the transition of a.d. 50-150 was both deeper and more complex than Baur conceived, the transfer of the gospel during that century from Jewish to Gentile soil is really the great outstanding fact, against which as a background the literature must be read; and the initial stage of the process is marked by the controversy of Paul with the Galilean apostles. What we must call, in distinction from Paulinism, 'apostolic' Christianity is well represented in the Book of Acts. Paul's writings show that he felt himself and his churches to represent an independent type of Christianity in all respects equal to the 'apostolic,' the problem being unification of the two. Now it is axiomatic that the investigator must proceed from the relatively known and determinable to the unknown and disputable. Accordingly it is in reality from the Epistolary literature of the church, in particular the greater Pauline Epistles, that he must take his start. As a source for our understanding of the development of the life of the church the Literature of the Apostle, directly participant in the conflicts and issues of the times, even if in its later elements of doubtful or pseudonymous authorship, takes precedence as a whole over the Literature of the Catechist, with its later and more or less idealized narration, exemplified in the Book of Acts.

Modern criticism acknowledges, then, its indebtedness to the Tübingen school for a clearer definition of both its task and method, by concentrating attention upon the contrast between the Petrine and the Pauline conception of 'the gospel.' Still it must be admitted that most of the inferences first drawn have since been overthrown. In their chronological scheme of the New Testament writings the Tübingen critics under-estimated the force of the external evidences (including early tradition) and misinterpreted the internal. New discovery and more careful study of literary relations have inverted Baur's views as to dates of the Johannine writings. Four of these (the Gospel and three Epistles) are anonymous. Baur's date for these has been forced back by no less than half a century. The fifth (Revelation) bears the name of John, but was hotly disputed as pseudonymous in the second century, and even by its supporters was dated so late as "the end of the reign of Domitian" (95). The Tübingen school placed Revelation thirty years earlier, and attributed it to the Apostle. Modern criticism emphatically reverts to the ancient date, and regards the book as pseudonymous, or as written by "some other John."

Again the relative dates of the Synoptic writings (Matthew, Mark, Luke-Acts) were inverted by the Tübingen critics, primarily through wrong application of their theory of doctrinal development; secondarily, and as a consequence, through misinterpretation of the intricate literary relationships. Present-day criticism considers it established that Mark is the oldest of the three, taken up by each of the other two. There is almost equal unanimity in regarding the discourse material common to Matthew and Luke and variously combined by each with Mark, as independently drawn by them from the book of the "Precepts of the Lord," reported by Papias to have been compiled by Matthew "in the Hebrew (i. e. Aramaic) tongue." Tübingen gospel criticism is thus almost entirely set aside, in favour of the so-called 'Two-document' theory.

So with the Pauline Epistles of the second period. Doubt still clings to Ephesians. It had been treated by some as pseudo-Pauline even before the time of Baur; but Baur's own followers soon receded from his extreme application of his theory to the internal evidence of Philippians, Colossians and Philemon. It became evident that Paul's "gospel" included something more than the mere antithesis of Law and Grace. He had other opponents than the Judaizers, and had to defend his doctrine against perversion by Grecizing mystics as well as against opposition by Pharisaic legalists.

Two generations of research and controversy have greatly advanced the cause of constructive criticism. Hand in hand with a more accurate dating of the literature, secured through more impartial judgment of both the external and internal evidence, there has gone a reconstruction of our conception of the course of events. The tendencies in the early church were not two only, but four; corresponding, perhaps, to those rebuked by Paul at Corinth, which called themselves by the names respectively of Peter, of Paul, of Apollos and of Christ. It seems probable from the bitterness with which in 2nd Cor. x. 7 Paul denounces the man who says, "I am of Christ," that this party-cry was employed in the sense of following the example of Jesus as respects obedience to the Law (for even Paul acknowledged that Christ had been "made a minister of the circumcision for the truth of God"). If so, the Corinthian "Christ-party" may be identified with those "ministers of the circumcision" who denied both the apostleship and the gospel of Paul. At all events those "of Cephas" were relatively harmless. They may be identified with the so-called 'weak' of Romans, for whose scruples on the score of 'pollutions of idols' Paul demands such consideration both at Corinth and at Rome. His own adherents both at Corinth (those 'of Paul') and at Rome (the 'strong') are to follow his example not merely in recognizing that: "No idol is anything in the world," that "there is nothing unclean of itself," and that "all things are lawful." It is to be followed also in recognizing the limitations of this liberty. Limits are imposed among other things by the scruples of others, so that Paul himself becomes "as under the Law" when among Jews, though "as without the Law" among the Gentiles. The "weak" are to be resisted only when the admission of themselves or their claims would lead to "doubtful disputations," or to a rebuilding of walls of separation that had been torn down through faith in Christ. Galatians sounds the battle-cry of endangered liberty. Corinthians (and Romans in still higher degree) shows the magnanimity of the victor.

Whether it be possible to identify those "of Apollos" at Corinth with the beginnings of that Hellenistic perversion of the Pauline gospel into a mystical theosophy which afterwards passed into Gnosticism may be left an open question. At least we have come to see that the conditions of the church's growth were far more complex than Baur imagined. In particular it is necessary to distinguish four different attitudes on the single question of the obligation of the Law. There were (1) Judaizers who insisted on complete submission to the Law as the condition of salvation, for both Jews and Gentiles; (2) imitators of Cephas, who considered believers of Jewish birth to be "under the Law," but asked of Gentiles only such consideration for it as the special conditions seemed to require; (3) Paulinists, who held that neither Jews nor Gentiles are under the law, yet felt that consideration should be shown for the scrupulous when asked not as of right, but as of charity; (4) radicals, who recognized no limits to their freedom save the one new commandment.

But while conflict first broke out over the mere concrete question of Gentile liberty, the real distinction of Paul's gospel from that of the older apostles was far deeper. The question as Tübingen critics conceived it concerned primarily the extent of the gospel message,—to how large a circle was it offered? Modern criticism has come to see that the difference was in higher degree a difference of quality. Paul's whole message of redemption through the cross and resurrection started from other premises than those of the Galilean apostles, and was conceived in other terms. For this reason it leads over to a new Christology. In short, the transition of Christianity from its Jewish to its Gentile form is not a mere enlargement of its field by the abolition of particularistic barriers. The background we must study for the understanding of it is not so much mere contemporary history as the contemporary history of religion. The development from the Petrine gospel broadly characteristic of the Synoptic writings, through the Pauline Epistles to that of the Johannine writings, is a transition from Hebrew to Hellenistic conceptions of what redemption is, and how it is effected. Modern criticism expresses the contrast in its distinction of the gospel of Jesus from the gospel about Jesus.

In the case of both Paul and his predecessors in the faith there is a common starting-point. It was the doctrine that God had raised Jesus from the dead and exalted Him as Christ and Lord to the throne of glory. Its proofs were the ecstatic phenomena of the Spirit, those strange manifestations of 'prophecy,' 'tongues,' and the like in the Christian assembly. The inference from this resurrection faith for an apostle of the Galilean group was that he must "teach all men everywhere to observe all things whatsoever Jesus had commanded." Jesus had been raised up in Israel as the Prophet like unto Moses; His apostle must repeat the remembered word of commandment and the word of promise. He will have an authority derived from the manifestations of signs and wonders. These had accompanied Jesus' own career, and now, by grace of His endowment of His disciples with the Spirit, they will be repeated by their hands. The 'apostolic' gospel is thus primarily historical. The Pauline gospel centres at the other pole of religious conviction. It is primarily psychological. For Paul the immediate effect of the revelation of God's Son "in" him is an irresistible impulse to relate his own soul's experience. The gospel he preaches is not so much what Jesus did or said while on earth, as what God has done, and is still doing, through the "life-giving Spirit" which emanates from the risen Lord. Signs and wonders are tokens of the Spirit, but are of less value, and must vanish before the "abiding" ethical gifts. Both the Pauline and the Petrine gospel start from the common confession of "Jesus as Lord"; but the Christology of the Synoptic literature is an Apotheosis doctrine, falling back on the historical Jesus. That of the Epistles is a doctrine of Incarnation, appealing to the eternal manifestation of God in man. For the former, Jesus was "a prophet mighty in deed and word," raised up by God in accordance with the promise of Deut. xviii. 18, to turn Israel to repentance. Having fulfilled this mission in rejection and martyrdom Jesus had been exalted to God's "right hand" and "made both Lord and Christ." He there awaits the subjection of all His enemies. In the Pauline gospel the story of Jesus is a drama of the supernal regions, wherein His earthly career as prophet, leader, teacher, sinks to the level of the merest episode. As pre-existent spirit, Jesus had been from the beginning of the creation "in the form of God." As the period of its consummation drew near He took upon Him human form, descended through suffering and death to the lowest depths of the underworld, and by divine power had reascended above all the heavens with their ranks of angelic hierarchies. Whether Paul himself so conceived it or not, the Gentile world had no other moulds of thought wherein to formulate such a Christology than the current myths of Redeemer-gods. The value of the individual soul had at last been discovered, and men resorted to the ancient personifications of the forces of nature as deliverers of this new-found soul from its weakness and mortality. The influential religions of the time were those of personal redemption by mystic union with a dying and resurrected "Saviour-god," an Osiris, an Adonis, an Attis, a Mithra. Religions of this type were everywhere displacing the old national faiths. The Gentile could not think of "the Christ" primarily as a Son of David who restores the kingdom to Israel, shatters the Gentiles like a potter's vessel and rules them with a rod of iron. If he employed this Old Testament language at all, it had for him a purely symbolical sense. The whole conception was spiritualized. The "enemies" overcome were the spiritual foes of humanity, sin and death; "redemption" was not the deliverance of Israel out of the hand of all their enemies, that (together with all afar off that call upon the name of this merciful God) they may "serve Him in holiness and righteousness all their days." It was the rescue of the sons of Adam out of the bondage to evil Powers incurred through inheritance of Adam's sinful flesh. This had been the tendency already of Jewish apocalypse. The starting-point of Paul's own conceptions was not Israel's bondage in Egypt, but a conception already tinged, like the late book of Jewish philosophy called the Wisdom of Solomon, with the Stoic conception of 'flesh' as prison-house of 'spirit,' already inflamed, like the contemporary Jewish apocalypses of Esdras and Baruch, with lurid visions of a universe rescued by superhuman power from a thraldom of demonic rule. Paul's preaching was made real by his own experience. For if ever there was an evangelist whose message was his own experience, Paul was such. And Paul's experience was not so much that of a Palestinian Jew, as that of a Hellenist, one whose whole idea of 'redemption' has been unconsciously universalized, individualized, and spiritualized, by contact with Greek and Hellenistic thought. Paul and the Galilean apostles were not far apart in their expectations of the future. Both stood gazing up into heaven. But for his authority Paul inevitably looked inwards, the Galilean apostles looked backwards.

It is hopeless at the present stage of acquaintance with the history of religion, particularly the spread of the various 'mysteries' and religions of personal redemption in the early empire, to deny this contrast between the gospel of Paul and the gospel of "the apostles and elders at Jerusalem." It is shortsighted to overlook its significance in the transition of the faith. Whereas the Jewish-Christian had as its principal background the national history, more or less transcendentalized in the forms of apocalypse, Paul's had as its principal background the speculative mythology of the Hellenistic world, more or less adapted to the forms of Judaism. Only ignorance of the function of mythology, especially as then employed to express the aspiration of the soul for purity, life and fellowship with God, can make these mythologically framed religious ideas seem an inappropriate vehicle to convey Paul's sense of the significance of Jesus' message and life of "Son ship." They were at least the best expression those times and that environment could afford of the greater Kingdom God had proclaimed in the resurrection of the Christ, and was bringing to pass through the outpouring of His Spirit.