What agitation, what the liberator and the lecture platform, what statesmen and compromisers could not achieve, was accomplished by the spirit of God working upon the hearts of men, clarifying the intellect, deepening the sympathy and lending vigour to the will. The first thing the leader of an orchestra does is to see to it that the instruments are all unified and brought up to concert pitch, and the revival of religion made the people one in self-sacrifice and their willingness to live and die for their convictions. Multitudes returned to the churches. Thoughtless youth discovered that there are only two great things in the universe--God and the soul. Personal religion became the supreme interest of the hour. Men went into the crucible commonplace; they came out of it heroic stuff. All over the country the churches were open every night in the week. Moving across the country the traveller saw the candles burning in the little schoolhouses, while the farmers assembled to pray and read God's word. The Fulton Street prayer-meeting in New York attracted the interest of the nation. The morning newspapers of 1858 carried columns concerning the business men's noon prayer-meeting, just as to-day they carry the column on the stock news and the stock market. In his "History of the United States" Rhodes calls attention to the fact that 230 persons joined Plymouth Church on profession of faith on a single Sunday morning. That revival all over the land put its moral stamp upon boys and girls who afterwards became the leaders of the generation. Now every reform and every great war for principle proceeds along intellectual lines clearly laid out. Twenty-seven years before the Lincoln-Douglas debates, the "Tariff of Abominations" had brought up the question of the right of the Southern states to secede. Calhoun had set up his famous doctrine, and Webster, in his "Second Reply to Hayne," had knocked it down. The feeling had been intense, but Webster's wonderful oration in defense of the Constitution and the Union had succeeded in meeting the crisis, and settling for a time the vexing problem. Yet the evil of slavery continued its fatal gnawing at the heart of the nation. By 1855-6 the old question was up again in much the same form. The atmosphere was clouded, the black shroud of the approaching storm already discernible on the horizon. A hundred minor problems united in complicating the discussion of the one all-important thing. Another leader was wanted to set the battle in array, to mark out the lines of conflict. Webster and Calhoun were gone, but another was to come to preserve "liberty and union, one and inseparable." This man was Abraham Lincoln, and the opponent who was to call out his clearest expositions of the situation, and spur him on to his greatest arguments, was Stephen A. Douglas of Illinois.