After the necessary preliminaries and customary forms, he received on October 4, 1512, the rights of a licentiate, and on the 18th and 19th was solemnly admitted to the degree of doctor. As licentiate he promised to defend with all his power the truth of the gospel, and he must have had this oath particularly in his mind when he afterwards appealed to the fact of his having sworn on his beloved Bible to preach it faithfully and in its purity. His oath as doctor, which followed, bound him to abstain from doctrines condemned by the Church and offensive to pious ears. Obedience to the Pope was not required at Wittenberg, as it was at other universities.
Others, besides Staupitz, expected from the beginning something original and remarkable from the new professor. Pollich, the first great representative of Wittenberg in its early days, and who died in the following year, said of him, 'This monk will revolutionise the whole system of Scholastic teaching.' He seems, like others whom we hear of afterwards, to have been especially struck with the depth of Luther's eyes, and thought that they must reveal the working of a wonderful mind.
A new theology, in fact, presented itself at once to Luther in the subject which, as doctor, he chose and exclusively adhered to in his lectures. This was the Bible, the very book of which the study was so generally undervalued in School-theology, which so many doctors of theology scarcely knew, and which was usually so hastily forsaken for those Scholastic sentences and a corresponding exposition of ecclesiastical dogmas.
Luther began with lectures upon the Psalms. It is his first work on theology which has remained to posterity. We still possess a Latin text of the Psalter furnished with running notes for his lectures (a copy of it is given in these pages), and also his own manuscript of those lectures themselves. In these also he states that his task was imposed upon him by a distinct command: he frankly confessed that as yet he was insufficiently acquainted with the Psalms; a comparison of his notes and lectures shows further, how continually he was engaged in prosecuting these studies. His explanations indeed fall short of what is required at present, and even of what he himself required later on. He still follows wholly the mediaeval practice of thinking it necessary to find, throughout the words of the Psalmist, pictorial allegories relating to Christ, His work of salvation, and His people. But he was thus enabled to propound, while explaining the Psalms, the fundamental principles of that doctrine of salvation which for some years past had taken such hold on his inmost thoughts and so engrossed his theological studies. And in addition to the fruits of his researches in Scripture, especially in the writings of St. Paul, we observe the use he made of the works of St. Augustine. His acquaintance with the latter did not commence until years after he had joined the Order, and had acquired independently an intimate knowledge of the Bible. It was mainly through them that he was enabled to comprehend the teaching of St. Paul, and to find how the doctrine of Divine grace, which we have already alluded to, was based on Pauline authority. Thus the founder of the Order became, as it were, his first teacher among human theologians.