In 1514, he was made doctor in philosophy, and began to teach. His age was seventeen. The grace and attractiveness which he gave to his lectures formed a striking contrast to the insipid method which the doctors, and especially the monks, had hitherto pursued. He took an active part in the combat in which Reuchlin was engaged with the Obscurants of his age. His agreeable conversation, his gentle and elegant manners, gaining him the love of all who knew him, he soon acquired great authority, and a solid reputation in the world.

At this time, the Elector Frederick having conceived the idea of inviting some distinguished professor of ancient languages to his university of Wittemberg, applied to Reuchlin who suggested Melancthon. Frederick saw all the lustre which this young Hellenist might shed on an institution which was so dear to him; and Reuchlin, delighted at seeing so fine a field opened to his young friend, addressed him in the words of Jehovah to Abraham,—"Come out from thy country, and thy kindred, and thy father's house, and I will render thy name great, and thou shalt be blessed." "Yes," continues the old man, "I hope it will be so with thee, my dear Philip, my work and my comfort."[512] In this invitation, Melancthon saw a call from God. The university was grieved to part with him, and yet he was not without envious rivals and enemies. He left his native country, exclaiming, "The will of the Lord be done." He was then twenty-one years of age.

Melancthon made the journey on horseback, in company with some Saxon merchants, in the same way in which caravans travel in the desert; for, says Reuchlin, he knew neither the towns nor the roads.[513] At Augsburg he did homage to the Elector, who happened to be there. At Nuremberg he saw the excellent Pirckheimer, whom he already knew, and at Leipsic formed an intimacy with the learned Hellenist, Mosellanus. In this last town the university gave a fete in honour of him. It was a truly academic repast. The dishes were numerous, and as each made its appearance, a professor rose and addressed Melancthon in a Latin discourse previously prepared. He immediately gave an extempore reply. At length, worn out with so much eloquence, "Most illustrious friends," said he, "allow me to reply once for all to your addresses; for not being prepared, I cannot put as much variety into my replies as you into your addresses." Thereafter the dishes arrived without the accompaniment of a discourse.[514]

Reuchlin's young relative arrived at Wittemberg, 25th August, 1518, two days after Leo X had signed the brief addressed to Cajetan, and the letter to the Elector.

The professors of Wittemberg did not receive Melancthon with so much favour as those of Leipsic had done. The first impression which he made upon them did not correspond to their expectations. They saw a young man, who seemed still younger than he really was, of small stature, and a feeble, timid air. Is this the illustrious doctor whom the greatest men of the age, Erasmus and Reuchlin, extol so loudly?... Neither Luther, with whom he first was made acquainted, nor his colleagues, conceived high hopes of him, when they saw his youth, his embarrassment, and whole appearance.

Four days after his arrival (29th August) he delivered his inaugural address. The whole university was assembled. The boy, as Luther calls him,[515] spoke such elegant Latin, and displayed so much knowledge, a mind so cultivated, and a judgment so sound, that all his hearers were filled with admiration.

At the termination of the address, all pressed forward to congratulate him, but none felt more joy than Luther, who hastened to communicate to his friends the feelings with which his heart was overflowing. Writing Spalatin, 31st August, he says, "Melancthon, four days after his arrival, delivered an address so beautiful and so learned, that it was listened to with universal approbation and astonishment. We have soon got the better of the prejudices which his stature and personal appearance had produced. We praise and admire his eloquence; we thank the prince and you for the service you have done us. I ask no other Greek master. But I fear that his delicate body will not be able to digest our food, and that, on account of the smallness of his salary, we shall not keep him long. I hear that the Leipsic folks are already boasting of being able to carry him off from us. Oh, my dear Spalatin, beware of despising his age and personal appearance. He is a man worthy of all honour.[516]

Melancthon immediately began to explain Homer, and St. Paul's Epistle to Titus. He was full of ardour. "I will do my utmost," wrote he to Spalatin, "to bring Wittemberg into favour with all who love literature and virtue."[517] Four days after the inauguration, Luther again wrote to Spalatin, "I recommend to you most particularly the very learned and very amiable Greek, Philip. His class-room is always full. All the theologians in particular attend him. He sets all classes from the highest to the lowest, to the learning of Greek."[518]

Melancthon was able to return the affection of Luther, in whom he soon discovered a goodness of heart, a strength of intellect, a courage and a wisdom, which he had not previously found in any man. He venerated and loved him. "If there is any one," said he, "whom I love strongly, and whom my whole soul embraces, it is Martin Luther."[519]

"Thus met Luther and Melancthon, and they were friends till death. We cannot sufficiently admire the goodness and wisdom of God in uniting two men so different, and yet so necessary to each other. What Luther had in warmth, elasticity, and force, Melancthon had in perspicuity, wisdom, and gentleness. Luther animated Melancthon; Melancthon moderated Luther. They were like the two forms of electric matter, the positive and the negative, which modify each other. Had Luther been without Melancthon, the stream had perhaps overflowed its bank; and, on the other hand, Melancthon, when without Luther, hesitated, and even yielded, where he ought to have stood firm.[520] Luther did much by vigour, and Melancthon perhaps did not less by pursuing a slower and calmer course. Both were upright, open, and generous, and both, smitten with the love of the word of eternal life, served it with a fidelity and devotedness which formed the distinguishing feature of their lives.