But whatever were the faults of Abelard; however selfish he was in his treatment of Heloise, or proud and provoking to adversaries, or even heretical in many of his doctrines, especially in reference to faith, which he is accused of undermining, although he accepted in the main the received doctrines of the Church, certainly in his latter days, when he was broken and penitent (for no great man ever suffered more humiliating misfortunes),--one thing is clear, that he gave a stimulus to philosophical inquiries, and awakened a desire of knowledge, and gave dignity to human reason, beyond any man in the Middle Ages. The dialectical and controversial spirit awakened by Abelard led to such a variety of opinions among the inquiring young men who assembled in Paris at the various schools, some of which were regarded as rationalistic in their tendency, or at least a departure from the patristic standard, that Peter Lombard, Bishop of Paris, collected in four books the various sayings of the Fathers concerning theological dogmas. He was also influenced to make this exposition by the "Sic et Non" of Abelard, which tended to unsettle belief. This famous manual, called the "Book of Sentences," appeared about the middle of the twelfth century, and had an immense influence. It was the great text-book of the theological schools. About the time this book appeared the works of Aristotle were introduced to the attention of students, translated into Latin from the Saracenic language. Aristotle had already been commented upon by Arabian scholars in Spain,--among whom Averroes, a physician and mathematician of Cordova, was the most distinguished,--who regarded the Greek philosopher as the founder of scientific knowledge. His works were translated from the Greek into the Arabic in the early part of the ninth century. The introduction of Aristotle led to an extension of philosophical studies. From the time of Charlemagne only grammar and elementary logic and dogmatic theology had been taught, but Abelard introduced dialectics into theology. A more complete method was required than that which the existing schools furnished, and this was supplied by the dialectics of Aristotle. He became, therefore, at the close of the twelfth century, an acknowledged authority, and his method was adopted to support the dogmas of the Church. Meanwhile the press of students at Paris, collected into various schools,--the chief of which were the theological school of Notre Dame, and the school of logic at Mount Genevieve, where Abelard had lectured,--demanded a new organization. The teachers and pupils of these schools then formed a corporation called a university (Universitas magistrorum et Scholarium), under the control of the chancellor and chapter of Notre Dame, whose corporate existence was secured from Innocent III. a few years afterwards.