Of course there was a field of Jewish Cabbalistic literature,—not open, but confined, for the most part, as a kind of sacred mystery, within narrow and restricted limits, even among the Jews themselves. It was of the same nature with what is called, to-day, The Speculative Philosophy of Free Masonry, an ever seemingly substantive embodiment out of surrounding shadowy mists and mental fogs, wherein a doubt always exists whether after all there is in the nebulous matter of the mist itself anything from whence substance may congeal; or, it may, for illustration, be compared to the city of King Arthur, before whose gate Gareth, standing, says: “But these my men—(your city moves so weirdly in the mist),—doubt if the King be King at all, or come from Fairy land: and whether this be built by magic, and by fairy kings and queens, or whether there be any city at all, or all a vision.” It is necessary to make a brief mention of this literature with its sources; both that these may be known, and that a foundation may be laid for what is stated as to the reality of Cabbalah, and its significance. There is almost no teaching of the Cabbalah in the English language except the Essay by Christian D. Ginsburg, LL. D., to which we have referred. Dr. Ginsburg says: “It is a system of religious philosophy, or more properly, of theosophy, which has not only exercised for hundreds of years an extraordinary influence on the mental development of so shrewd a people as the Jews, but has captivated the minds of some of the greatest thinkers of Christendom in the sixteenth and seventeenth centuries, and which claims the greatest attention of both the philosopher and theologian.” It is faintly claimed that some statements applying to Cabbalah are to be found in the Talmud; but apart from this we have:—(1) The Commentary on the Ten Sephiroth, by R. Azariel ben Manachem (1160-1238), who was a pupil of Isaac the Blind, and master of the celebrated R. Moses Nachmanides, (2) The Book Sohar (Light), or Midrash, Let there be Light, claimed to have been a revelation from God, communicated through R. Simon ben Jochai, A. D. 70-110, to his select disciples. This book has been pronounced by the ablest critics to have been a pseudograph of the thirteenth century,—the composition of Moses de Leon, who lived in Spain; who, by the admission of his wife and daughter after his death, first published and sold it as the production of R. Simon ben Jochai, and (3) The Book Jetzirah or Book of Creation,—of unknown age and authorship, but mentioned as early as the eleventh century in the Book Chazari, by R. Jehudah Ha Levi,—as the literary sources for the entire system and scope thereof, so far as disclosed. It is from these sources that the entire volume of Cabbalistic literature has had rise and development.