Paganini used to tell with an amusing air of assumed awe and reverence, that his mother had seen, a few days before his birth, an angel with two wings and of such dazzling splendor that she could not bear to look at the apparition. The heavenly messenger invited her to express a wish, and promised that it should be fulfilled. Thereupon she begged him on her knees to make her Nicolo a great violinist, and was told that it should be so. The vision--perhaps nothing more than a vivid form of earnest desire and fervent prayer--had, no doubt, a serious influence on the great artist, who was himself strangely susceptible to such impressions. (_Moniteur_, Sept. 30, 1860.) Nothing can here be said, according to the purpose of these sketches, of the long series of visions vouchsafed to martyrs and saints; their history belongs to theology. But holy men have, independent of their religious convictions, often been as famous for their visions as for the piety of their hearts, and their achievements in the world. Loyola, for instance, with his faculties perpetually strained to the utmost, and with his thoughts bent forever upon a grand and holy aim, could not well fail to rise to a state of psychic excitement which naturally produced impressive visions. Hence he continually saw strange sights and heard mysterious voices, the effect now of extreme despondency and now of restored confidence in God and in himself as the agent of the Most High. And yet these visions never interfered with the clearness of his judgment nor with his promptness and energy in acting. Luther, also, one of the most practical men ever called upon to act and to lead in a great crisis, had visions; he saw the Devil and held loud discussions with him; he suffered by his persecutions, and made great efforts to rid himself of his unwelcome guest, while engaged in his great work, the translation of the Bible. For he was, after all--and for very great and good purposes--only a man of his age, imbued with the universal belief in the personal existence and constant presence of Satan, and felt, at the same time, that he was engaged in a warfare upon the results of which depended not only the earthly welfare, but the eternal salvation of millions.