When the ecclesiastical troubles at Wittenberg necessitated his permanent return thither, he declared to the Elector, who had hitherto never heard such language from his lips, “Your Electoral Grace is already aware, or, if unaware, is hereby apprised of the fact, that I have not received the Gospel from man, but from heaven only, through Our Lord Jesus Christ, so that I might already have accounted myself and signed myself a servant and evangelist, and for the future shall do so.”[228] We must also refer to the days of his Saxon Patmos--which exercised so deep an influence on his interior life--the remarkable mystical utterance to which his pupils afterwards declared he had given vent at a later date, viz. that he had been “commanded,” nay, “enjoined under pain of eternal reprobation (‘_interminaretur_’) not to doubt in any way of these things [of the doctrines he was to teach].”[229] Every road that led back to his duty to the Church and his Order was barred by the gloomy enthusiasm Luther kindled within himself, subsequently to his spiritual baptism in the Wartburg. The time spent in the Wartburg brought him his final conviction in his calling as a prophet and his divine commission, but if we are to understand Luther aright we must not forget that this conviction was a matter of gradual growth (cp. vol. iii., xvi. 1). We cannot doubt that even in the first years of his public career, certainly in 1519 and 1520, the belief in his own divine mission had begun to take firm root in his mind. In order to explain the rise of this idea we must turn first of all to his confidential letters dating from this period; his public writings in this respect are of less importance. With their help it is possible to recognise to some extent the course of this remarkable psychological development. So soon as he had perceived that his discovery, of the worthlessness of good works, and of justification by faith alone, was in permanent contradiction to the teaching of the Roman Church, the presentiment necessarily began to awaken within him, that the whole body of the faithful had been led by Rome into the greatest darkness. He fancied himself fortified in this idea by the sight of the real abuses which had overspread the whole life of the Church in his time. He thought he descried a universal corruption which had penetrated down to the very root of ecclesiasticism, and he did not scruple to say so in his earliest sermons and lectures. He felt it his duty to bewail the falling away. In the hours in which he gave free play to his fancy, it even seemed to him that Christ and the Gospel had almost disappeared.