His duties consisted principally in explaining the "Sentences" of Peter Lombard , and his commentaries on that text-book of theology furnished the materials and, in great part, the plan for his chief work, the "Summa theologica" .In due time he was ordered to prepare himself to obtain the degree of Doctor in Theology from the University of Paris, but the conferring of the degree was postponed, owing to a dispute between the university and the friars.Calo says that the change was made at the instance of the Abbot of Monte Cassino, who wrote to Thomas's father that a boy of such talents should not be left in obscurity (Prümmcr, op. At Naples his preceptors were Pietro Martini and Petrus Hibernus. Thomas could repeat the lessons with more depth and lucidity than his masters displayed.The chronicler says that he soon surpassed Martini at grammar, and he was then given over to Peter of Ireland, who trained him in logic and the natural sciences. The youth's heart had remained pure amidst the corruption with which he was surrounded, and he resolved to embrace the religious life.John the Teutonic, fourth master general of the order, took the young student to Paris and, according to the majority of the saint's biographers, to Cologne, where he arrived in 1244 or 1245, and was placed under Albertus Magnus , the most renowned professor of the order.
Against his book, "De periculis novissimorum temporum" (The Perils of the Last Times), St. The book of William of St-Amour was condemned by Alexander IV at Anagni, 5 October, 1256, and the pope gave orders that the mendicant friars should be admitted to the doctorate. Thomas also combated a dangerous book, "The Eternal Gospel" ( Touron, op. The university authorities did not obey immediately; the influence of St.Philosopher, theologian, doctor of the Church ( Angelicus Doctor ), patron of Catholic universities, colleges, and schools.Born at Rocca Secca in the Kingdom of Naples, 1225 or 1227; died at Fossa Nuova, 7 March, 1274.At the instance of Theodora, Thomas's brothers, who were soldiers under the Emperor Frederick, captured the novice near the town of Aquapendente and confined him in the fortress of San Giovanni at Rocca Secca.
Here he was detained nearly two years, his parents, brothers, and sisters endeavouring by various means to destroy his vocation.
He fell into a gentle sleep, and, as he slept, two angels appeared to assure him that his prayer had been heard.