When the day drew nigh for him to celebrate his first Mass as newly ordained priest, he invited not only his father but several other guests to be present at a ceremony which meant so much both to him and to his friends. Thus, in a letter of invitation to Johann Braun, Vicar in Eisenach, who had shown him much kindness and help during his early years in that town, he says that: “God had chosen him, an unworthy sinner, for the unspeakable dignity of His service at the altar,” and begged his fatherly friend to come, and by his prayers to assist him “so that his sacrifice might be pleasing in the sight of God.” He also expressed to him his great indebtedness to Schalbe’s College at Eisenach, which he would also have gladly seen represented at the ceremony. This is the first letter of Luther’s which has been preserved and with which the critical edition of his “Correspondence,” now being published, commences.[28] The first Mass took place on Cantate Sunday, May 2, 1507. Luther relates later, with regard to his state of mind during the sacred ceremony, that he could hardly contain himself for excitement and fear. The words “_Te igitur clementissime Pater_,” at the commencement of the Canon of the Mass, and “_Offero tibi Deo meo vivo et vero_,” at the oblation, brought so vividly to his mind the Awful, Eternal Majesty, that he was hardly able to go on (“_totus stupebam et cohorrescebam_”); he would have rushed down from the altar had he not been held back; the fear of making some mistake in the ceremonies and so committing a mortal sin, so he says, quite bewildered him.[29] Yet he must have known, with regard to the ceremonies, that any unintentional infringement of them was no sin, and least of all a mortal sin, although he attributes the contrary opinion to the “Papists” after his apostasy. His father Hans assisted at the celebration. His presence in the church and in the refectory was the first sign of his acquiescence in his son’s vocation. But when the latter, during dinner, praised the religious calling and the monastic life as something high and great,[30] and went on to recall the vow he had made at the time of the thunderstorm, asserting that he had been called by “terrors from Heaven” (“_de cœlo terrores_”), this was too much for his level-headed father, who, to the astonishment of the guests, sharply interposed with the words: “Oh, that it may not have been a delusion and a diabolical vision.” He could not overcome his dislike for his son’s resolve. “I sit here and eat and drink,” he cried, “and would much rather be far away.” Luther retorted he had better be content, and that “to be a monk was a peaceful and heavenly life.”[31] The statement with regard to the elder Luther agrees with the character of the man and with the severity which he had displayed long before to Martin.