This "History" was not only a great literary success, it was more. It produced a decided revolution in historical science. The effect of it in Switzerland, Germany, and in fact the whole of Europe, was immense. The extraordinary part enacted by that great Pope was seen for the first time in its proper light. By the irresistible logic of facts, Hurler demonstrated how the august institutions of the papacy accomplished its mission with a success which, up to his time, had never been conjectured. Every one became convinced that it was the papacy alone that had mastered and tempered the overwhelming forces of the half-civilized nations of Europe, in order to more eternal and spiritual ends. "Since then," says Hurter himself, in his preface to the third German edition of his first volume, page 21, "a great number of inveterate errors were corrected, many traditional prejudices dissipated, many doubts removed; certain minds drew light therefrom, others found a guide in it, and others attained _conviction_ from its pages. Comparing the present with the past, people became more circumspect in their judgments and less inconsistent in their conclusions, and at last an answer was found to the famous question of the Roman governor, "What is truth?" (_Quid est veritas?_) "Truth is what is based on the indisputable proofs of history and agrees with the nature of all things." Sebastian Brunner, a distinguished German writer, after reading the "History of Innocent III.," gave the following opinion of its author: "I hold Mr. Hurter to be the greatest of historians; no one previous to him embraces a whole century in so admirable a picture. Hurter is the apostolic historian of the nineteenth century." This apostleship of Frederick Hurter was the more efficient, being exercised by a Protestant, and, what was more, by the president of a consistory. And beside, who would not yield to the testimony of a man whose loyalty and integrity were above all suspicion, and who had made it the rule of his life to observe the most rigid impartiality in all his own views; to seek nothing but the truth, and to honor virtue and merit wherever met, without excepting those who differed from him, so as to neglect nothing in the accomplishment of his task in the most perfect possible manner? His indeed were admirable qualities, particularly when we consider how history was written in those times by writers looked upon as models and masters. But let us not enlarge on this topic; the "History of Innocent" is found in every library; let us rather show how that book earned for its author a reward far greater than mere worldly reputation.