Zunz, Jost and their followers, the entire Breslau school, for any attempt at presenting the contents of Judaism as a system of faith. Only the pioneers of Reform Judaism, Geiger, Holdheim, Samuel Hirsch, Formstecher, Ludwig Philippson, Leopold Stein, Leopold Loew, and the Reform theologian _par excellence_ David Einhorn, and likewise, Isaac M. Wise in America, made great efforts in that direction. Still a system of Jewish theology was wanting. Accordingly when, at the suggestion of my dear departed friend, Dr. Gustav Karpeles, President of the Society for the Promotion of the Science of Judaism in Berlin, I undertook to write a compendium (Grundriss) of Systematic Jewish Theology, which appeared in 1910 as Vol. IV in a series of works on Systematic Jewish Lore (Grundriss der Gesammtwissenschaft des Judenthums), I had no work before me that might have served me as pattern or guide. Solomon Schechter’s valuable studies were in the main confined to Rabbinical Theology. As a matter of fact I accepted the task only with the understanding that it should be written from the view-point of historical research, instead of a mere dogmatic or doctrinal system. For in my opinion the Jewish religion has never been static, fixed for all time by an ecclesiastical authority, but has ever been and still is the result of a dynamic process of growth and development. At the same time I felt that I could not omit the mystical element which pervades the Jewish religion in common with all others. As our prophets were seers and not philosophers or moralists, so divine inspiration in varying degrees constituted a factor of Synagogal as well as Scriptural Judaism. Revelation, therefore, is to be considered as a continuous force in shaping and reshaping the Jewish faith. The religious genius of the Jew falls within the domain of ethnic psychology concerning which science still gropes in the dark, but which progressive Judaism is bound to recognize in its effects throughout the ages. It is from this standpoint, taken also by the sainted founder of the Hebrew Union College, Isaac M. Wise, that I have written this book. At the same time I endeavored to be, as it behooves the historian, just and fair to Conservative Judaism, which will ever claim the reverence we owe to our cherished past, the mother that raised and nurtured us.