He was mainly instrumental in introducing the knowledge of the Greek language among the Protestants, and also in encouraging them to study the Hebrew, because he saw that a knowledge of the original languages was absolutely essential in order to understand the Holy Scriptures properly. Besides this, as we have heard before, he wrote critical expositions of most of the books of the Bible. His Latin comments upon the Gospel lessons appointed to be read in the Churches, were delivered before the Hungarians, who did not understand the German language. CHRISTOPHER PEZEL informs us of their origin: "When the University was re-established after the war of Smalkald, Philip Melanchthon began to explain the Gospels for Sundays and festival days, in his own house, for the sake of a number of Hungarians, who were not able to understand the German sermons in the churches. As a large number of other persons also began to attend these lectures or sermons, in which he explained the principal truths of his text in a familiar conversational manner, he was obliged to hold them in the public Lecture-Room. As he was very skilful in instructing youth, and thoroughly supplied with every kind of learning, he was careful to suit his explanations to the capacities of his hearers, the greater part of whom were young men, and many of them boys." These lectures were very numerously attended. He was in the habit of beginning to explain the separate verses according to their literal meaning. He then proceeded to inquire whether his explanation agreed with the context, and then went on to develop the doctrines of faith. He laid great stress upon this analogy of Scripture truths. And this alone, which the ungodly commentators of later times did not recognize, throws a full light upon exposition. We are already sufficiently well acquainted with his system of doctrine. Although, as we have seen, he yielded in some points in an improper manner, he nevertheless adhered to the substance of divine truth. The Augsburg Confession was his Confession. Whenever therefore any one attacked the fundamental doctrines of Christianity, as they are represented in the confessions of the first centuries, he would become very much excited, and thought that such persons ought to be punished. Therefore he decidedly approved of the burning of MICHAEL SERVETUS, who rejected and blasphemed the doctrine of the Trinity. He acted in the spirit of the Old Testament, and forgot, that although such persons cannot be regarded as members of the Christian church, they must be borne with patiently.