Nonetheless, it needed the stress of circumstance to force it into its fitting place in the new religion. Despite the many passages inserted to bring its narrative into harmony with the other gospels, the fourth differs so much more from them than they do from each other that only the vital needs of the cult in its struggle for existence can account for the final adoption of all four. But these needs were compulsive, and overrode the opposition the fourth gospel evoked. Such a mass of doctrine purporting to come from the very mouth of the founder could not in any case be refused by such a community; and when once the treatise on such grounds had been taken into the canon it played its part in paralyzing the faculty of judgment. The fourth gospel directly excludes the pretence that the God-man was born at Bethlehem; yet it was grouped, like the second, which ignores the tale, with the first and third, which circumstantially yet discordantly enounce it. Where irreconcilable differences on the most essential matters of biographical fact could thus be let pass, the widest divergence of doctrinal idea could find acceptance. The two pressures of predisposition and corporate interest availed to override the difficulties they had created; and the primary momentum of ignorant credulity among the faithful carried all before it. Easiness of belief correlated with proneness to invention, and the religious community cohered, as others do, by force of the gregarious bias, the hostile environment, and the economic interest. PART II CHRISTIANITY FROM THE SECOND CENTURY TO THE RISE OF ISLAM CHAPTER I DEVELOPMENTS IN THE UNESTABLISHED CHURCH § 1. Numbers and Inner Life