We shall confine this brief study of the Old Testament to the prophets, because they are the beating heart of the Old Testament. - Walter Rauschenbusch

Personal religion has a supreme value for its own sake, not merely as a feeder of social morality, but as the highest unfolding of life itself, as the blossoming of our spiritual nature. Spiritual regeneration is the most important fact in any life history. A living experience of God is the crowning knowledge attainable to a human mind.

The Christian movement began with John the Baptist. … in his recorded teaching to the people there is not a word about the customary ritual of religion, about increased Sabbath observance, about stricter washings and sacrifices, or the ordinary exercises of piety. He spoke only of repentance, of ceasing from wrongdoing. He hailed the professional exponents of religion who came to hear him, as a brood of snakes wriggling away from the flames of the judgment. ...The way to prepare for the Messianic era and to escape the wrath of the Messiah was to institute a brotherly life and to equalize social inequalities.

The twin-evil against which the prophets launched the condemnation of Jehovah was injustice and oppression.