In this fashion Rapoport, who did not hesitate to write on Bible criticism in Hebrew, the first to use the ancient language for the purpose, endeavored to reconcile the reason of a modern mind with the faith and the Messianic hope of an orthodox Rabbi. * * * * * It is a significant phenomenon that the Science of Judaism, the ideal meant to replace the dry study of the Law, and fill the void left in the Jewish mind by the course of recent developments, took firm hold upon the Polish Jews, the very bodyguard of Rabbinism, of which, in point of fact, it is but a modern and rational transformation. Yet this new science, founded on the study of Israel's glorious past, and warmly welcomed by the intellectual and the cultivated in Western Europe, could not entirely satisfy the intelligent in Polish Jewry. In an environment wholly Jewish, having no reason to nurse illusive hopes of imminent assimilation with their neighbors, from whom they were divided by every possible circumstance, beginning with moral notions and ending with political fortune, the Polish Jews resigned themselves to a sort of Messianic mysticism. But the mystic's explanation of the phenomenon of the existence of Judaism also failed to satisfy their yearnings. What they sought was a warrant in reason itself justifying the permanence of Judaism and its future. The arguments set forth by Maimonides and Jehudah Halevi contained no appeal for the modern soul. A philosopher was needed, one who should solve the problem of the existence of the Jewish people and its proper sphere from the vantage- ground of authoritative knowledge. Such a philosopher arose in Galicia itself. Nahman Krochmal (1785-1840), the originator of the idea of the "mission of the Jewish people", was born at Brody. His chief work, published posthumously through the efforts of Zunz, the _Moreh Nebuke ha- Zeman_ ("The Guide of the Perplexed of Modern Times"), is the most original piece of philosophic writing in modern Hebrew. Krochmal led the sad life of the Polish-Jewish scholar--void of pleasures and filled to overflowing with privation and suffering. His whole time was consecrated to Jewish science. He led a retired life, and while he lived nothing of his was published. On account of the precarious state of his health, he never left the small town in which he was born. However, his house became the foregathering place of the votaries of Jewish science. Especially young men eager to learn came from everywhere to sit at the feet of the master. The influence which he thus exerted during his life was reinforced and perpetuated after his death by the publication of the "Guide of the Perplexed of Modern Times", in 1851, at Lemberg. The studies contained in this work, for the most part unfinished sketches, form a curious collection. Limitations of space forbid more than a summary of its contents, and an analysis of its chief principles.