Many have sought to answer the questions—Why was the triumph of Islám so speedy and so complete? Why have so many millions embraced the religion of Moḥammad, and scarcely a hundred ever recanted? Why do a thousand Christians become Muslims to one Muslim who adopts Christianity? Why do a hundred and fifty millions of human beings still cling to the faith of Islám? Some have attempted to explain the first overwhelming success of the Moḥammadan religion by the argument of the sword. They forget Carlyle’s laconic reply, ‘First get your sword.’ You must win men’s hearts before you can induce them to peril their lives for you, and the first conquerors of Islám must have been made Muslims before they were made ‘fighters on the path of God.’ Others allege the low morality of the religion and the sensual paradise it promises as a sufficient cause for the zeal of its followers; but even were these admitted to the full, to say that such reasons could win the hearts of millions of men who have the same hopes and longings after the right and the noble as we, is to libel mankind. No religion has ever gained a lasting hold upon the souls of men by the force of its sensual permissions and fleshly promises. It is urged, again, that Islám met no fair foe, that the worn-out forms of Christianity and Judaism it encountered were no test of its power as a quickening faith, and that it prevailed simply because there was nothing to prevent it; and this was undoubtedly a help to the progress of the new creed, but it could not have been the cause of its victory. In all these reasons the religion itself is left out of the question. Decidedly Islám itself was the main cause of its triumph. By some strange intuition Moḥammad succeeded in finding the one form of Monotheism that has ever commended itself to any wide section of the Eastern world. It was only a remnant of the Jews that learned to worship the one God of the prophets after the hard lessons of the Captivity. Christianity has never gained a hold upon the East. Islám not only was at once accepted (partly in earnest, partly in name, but accepted) by Arabia, Syria, Persia, Egypt, Northern Africa, and Southern Spain at its first outburst, but, with the exception of Spain, it has never lost its vantage-ground; it has seen no country that has once embraced its doctrine turn to another faith; it has added great multitudes in India and China and Turkestan to its subjects; and in quite recent times it has been spreading in wide and swiftly—following waves over Africa, and has left but a small part of that vast continent unconverted to its creed. Admitting the mixed causes that contributed to the rapidity of the first torrent of Moḥammadan conquest, they do not account for the duration of Islám. There must be something in the religion itself to explain its persistence and increase, and to account for its present hold over so large a proportion of the dwellers on the earth.