But if he did not understand or care for eternal principles, he was perfect master of all the weak and low and petty side of human nature. He knew how to stir up all the common-place, base and ignoble passions of man; to bring his lower nature into lively exercise. The first day in the fair, the multitude was given up to him, and he swept and played on them as a master musician sweeps a piano, and for the hour he seemed to be irresistible, bearing all things in his own way. Lincoln had this advantage, when his turn came, that he represented that higher portion of human nature, of which Douglas had little knowledge, and which his mode of treatment had left almost wholly untouched. We have spoken of the vast legal influence which Lincoln had gradually acquired in his own state, by the intense pertinacity with which he identified himself in every case with right and justice, so that the mere fact that he had accepted a cause was a strong reason in advance for believing it the true one. The people had been excited, amused, dazzled and bewildered, and were tossing restlessly as the sea swells and dashes after a gale--when that plain man without outward "form or comeliness," without dazzle of oratory, or glitter of rhetoric, rose to give them in a fatherly talk, the simple eternal RIGHT of the whole thing. It was, he felt, an hour of destiny, a crisis in the great battle to be fought for mankind for ages to come, and an eye witness thus describes the scene: "His whole heart was in the subject. He quivered with feeling and emotion; the house was as still as death." And another account describes how "the effect of this speech was most magnetic and powerful. Cheer upon cheer interrupted him, women waved their handkerchiefs, men sprung from their seats and waved their hats in uncontrollable enthusiasm." Mr. Douglas was present at this speech, and was the most uneasy auditor there. As soon as Mr. Lincoln had concluded, Mr. Douglas jumped up and said that he had been abused, "though," he added, "in a perfectly courteous manner." He went on with a rejoinder, and spoke for some time, but without much success. In fact, he was astounded and disconcerted at finding that there was so much to be said against him, and that there was a man to say it so powerfully. The self-confident and even arrogant tone in which he had opened the debate was gone. At closing, he announced himself to continue his remarks in the evening, but he did not do it. He had received a blow too tremendous even for his immense vigor, and from which he could not so quickly recover.