But I shall be better pleased if the more serious side of this volume—Jewish mysticism and Rabbinic theology—should attract the attention of students, and so draw some fellow‐workers into a field which is utterly neglected. Notwithstanding the numerous Manuals and Introductions which all more or less touch on the subject of Rabbinic theology, there is, after nearly 250 years, not a single work among them which, either in knowledge of facts or in their interpretation, is a single step in advance of the Cambridge Platonist, John Smith, in his _Select Discourses_. But those who try so hard to determine the miraculous distance of Christianity by the eclipses in Rabbinism, should, if they wish to be just or prove themselves worthy scholars, also endeavour to make themselves acquainted with the numberless bright stars that move in the wide universe of Jewish thought. We are often told that no creed or theological system which has come down to us from antiquity can afford to be judged by any other standard than by its spiritual and poetic _possibilities_: this indulgence Judaism is as justly entitled to claim as any other religion. The great and saintly Franz Delitzsch who, born with an intellect of admirable temper, was also endowed by Heaven with a soul—and a beautiful soul it was—was one of the few theologians who, partly at least, admitted this claim, and sought earnestly and diligently after these spiritual and poetic possibilities, and was amply rewarded for his labours. I. THE CHASSIDIM(1) Throughout the whole of that interesting field of Theological Literature which deals with the genesis and course of religious movements, there is probably none whose history, even whose name, is so little known to English students, as that of the Chassidim. And yet it would be difficult to point, in comparatively recent times, to a Dissenting movement more strikingly complete in its development, more suggestive of analogy, more full of interest in its original purpose, more pregnant of warning in its decay. The Hebrew word “Chassidim”(2) merely means “the Pious,” and appears to have been complacently adopted by the early apostles of the sect. But the thing—Chassidism—was, in its inception at all events, a revolt among the Jews of Eastern Europe against the excessive casuistry of the contemporary Rabbis. It was in fact one more manifestation of the yearning of the human heart towards the Divine idea, and of its ceaseless craving for direct communion with God. It was the protest of an emotional but uneducated people against a one‐sided expression of Judaism, presented to them in cold and over‐subtle disquisitions which not only did they not understand, but which shut out the play of the feelings and the affections, so that religion was made almost impossible to them.