The phrase "Salt of the Earth," which I have taken to illustrate the meaning and value of social purity, has come to us from that wonderful compendium of ethical teaching known to Christians as the "Sermon on the Mount"; that body of coherent, consistent, and constructive doctrine from which Christianity—so soon as it had allied itself with Cæsar and the things of Cæsar—made such haste to depart. And the whole process of that departure was (from the pure ethical standard of the Sermon on the Mount) a process of adulteration—of impurity—an adaptation of a spiritual ideal to a secular practice of mixed motives. But the process really began earlier. It began in the attempt to identify the God of the Sermon on the Mount with Jahveh, the tribal God of Hebrew history. And in that attempted identification (incompatible ethics having to be reconciled) ethics became confounded.
The Rabbinical training of St. Paul, the Hebraistic tendencies of the early Christian Church (whose first device was to prosyletize the Jews on the old nationalistic assumption that they were the Chosen People), all combined to give an impure vision of God to the followers of the new faith. The nationalism of Judaism corrupted the internationalism of the Day of Pentecost; and the primitive Mosaic code uttered from Sinai, and adapted to the mission of racial conquest there enjoined, stultified the teaching of Calvary.
