This line of defence is remarkable enough to deserve to be chronicled. From the historical standpoint, however, we should bear in mind that Luther had recourse to “smuttiness” not merely in theological and religious writings or when desirous of producing some effect with “his excellent ideas.” The bad habit clings to him quite as much elsewhere, and disfigures his most commonplace conversations and casual sallies. Thus the psychological root of the problem lies somewhat deeper. We shall not be far wrong in believing, that a man who moved habitually amidst such impure imaginations, and gave unrestrained expression to statements of a character so offensive, bore within himself the cause. Luther was captain in a violent warfare on vows, religious rules, celibacy and many other ordinances and practices of the Church, which had formerly served as barriers against sensuality. Consciously or unconsciously his rude nature led him to cast off the fetters of shame which had once held him back from what was low and vulgar. After all, language is the sign and token of what is felt within. It was chiefly his own renunciation of the higher standard of life which led him to abandon politeness in speech and controversy, and, in word and imagery, to sink into ever lower depths. Such is most likely the correct answer to the psychological problem presented by the steady growth of this questionable element in his language. Friedrich Wilhelm Nietzsche (“Werke,” 7, p. 401) has a few words, not devoid of admiration for Luther, which, however, apply to the whole man and not merely to his habits of speech. They may well serve as a transition to what follows: “Luther’s merit lies in this, that he possessed the courage of his sensuality—in those days tactfully described as the ‘freedom of the Gospel.’” 5. On Marriage and Sexuality