The rise and progress of a new religion afford a subject of the highest interest to the philosophical observer. Under these circumstances human nature may be seen in a novel aspect. We behold the mind grasping at an ideal form of perfection, exulting in the imaginary possession of revelations, and rejoicing in its fancied intercourse with the Supreme Being. A new religion must, of necessity, be regarded by Christians as a mere imposture. Painful, however, as it is to contemplate our fellow-beings deceiving and deceived, it is instructive, on the one hand, to watch the demeanour of those who have succeeded in establishing a spiritual dominion, and, on the other hand, to notice the conduct of those who believe themselves surrounded by the full blaze of prophecy and miracle. Nor is the growth of a new religion a subject merely of philosophical curiosity. In a historical point of view it is worthy of all the light which careful investigation can bestow. The cause of truth imperatively demands that the progress of error should be diligently noted. How gladly should we receive the testimony of one who had been a witness of the early growth of the religion of Mahomet! How highly should we esteem an authentic account of the process by which the corrupt Christian of the seventh century was gradually alienated from the faith of his fathers, and induced to accept as divine the "revelations" of the Arabian impostor! To give such a testimony, to describe such a process, is within the power of the traveller at the present day. In Western America, amid countless forms of schism, a new religion has arisen, as if in punishment for the sins of Christendom. Like Mahometanism, it possesses many features in common with the religion of Christ. It professes to admit the inspiration of the Old and New Testaments, it even acknowledges the Trinity, the Atonement and Divinity of the Messiah. But it has cast away that Church which Christ erected upon the foundation of Apostles and Prophets, and has substituted a false church in its stead. It has introduced a new book as a depository of the revelations of God, which in practice has almost superseded the sacred Scriptures. It teaches men to regard a profane and ignorant impostor as a special prophet of the Almighty, and to consider themselves as saints while in the practice of impiety. It robs them sometimes of their substance, and too often of their honesty; and finally sends them, beneath a shade of deep spiritual darkness, into the presence of that God of truth whose holy faith they have denied.