"eternal" Rome, when the bishop of this city, in order to establish his right of supremacy in the Church, proclaimed himself to be the direct successor of the Apostle Peter, and caused the "possession of the keys" to have been given to this latter by Jesus himself. [504] So that there were very mundane and very practical reasons which after all gave the impulse for the God Jesus to be transformed into an historical individual, and for the central point of his action, the crisis in his life, his death and his resurrection, which alone affected religious considerations, to be placed in the capital of the Jewish state, the "City of God," the Holy City of David, of the "ancestors" of the Messiah, with which now the Jews connected religious salvation. But how could this fiction succeed and maintain its ground, so that it was able to become an absolutely vital question for the new religion, an indestructible dogma, a self-evident "fact," so that its very calling in question seems to the critical theologians of our time a perfect absurdity? Before we can answer this question we must turn our attention to the Gnostic movement and its relations to the growing Church. (d) Gnosticism and the Johannine Jesus. Christianity was originally developed from Gnosticism (Mandaism). The Pauline religion was only one form of the many syncretising efforts to satisfy contemporary humanity's need of redemption by a fusion of religious conceptions derived from different sources. So much the greater was the danger which threatened to spring up on this side of the youthful Church.