Luther now finished his exposition of the _Magnificat_, which, with loving devotion to the subject, he had intended for Prince John Frederick. He resumed also his work on the Sunday Gospels and Epistles. The first part of it he had already published in Latin. But he gave it now a new, and for the Christian people of Germany, a most important character, by writing in German his comments on these passages of Scripture, including those already dealt with in Latin, which formed the text of the sermon for the day. Thus arose his first collection of sermons, the 'Church-Postills.' By November he had already sent the first part to the press, though the work progressed but slowly. In a simple exposition of the words of the Bible, without any artificial and rhetorical additions or ornament, but with a constant and cheerful regard to practical life, with an unceasing attention to the primary questions of salvation, and in pithy, clear, and thoroughly popular language, he began to lay before his readers the sum total of Christian truth, and impress it on their hearts. The work served as much for the instruction and support of other preachers of the gospel now newly proclaimed, as for the direct teaching and edifying of the members of their flocks. It advanced, however, only by degrees, and Luther after many years was obliged to have it finished by friends, who collected together printed or written copies of his various sermons. For the special comfort and advice of his Wittenberg congregation Luther wrote an exposition of the thirty-seventh Psalm. Nor with less energy and force did he wield his pen during June, in a vigorous and learned polemical reply in Latin to the Louvain theologian, Latomus. And yet Luther all this while continued to lament that he had to sit there so idly in his Patmos: he would rather be burnt in the service of God's Word than stagnate there alone. The bodily rest which took the place of his former unwearied activity in the pulpit and the lecturer's chair, together with the sumptuous fare now substituted for the simple diet of the convent, were no doubt the cause of the physical suffering which for a long time had grievously distressed him and put his patience to the test, and which must have weighed upon his spirits. In his distress he once thought of going to Erfurt to consult physicians. Some strong remedies, however, which Spalatin got for him, gave him temporary relief.