This book by Abraham Joshua Heschel was the last book written by Judaism's preeminent spokesperson in the 1960s and 1970s. In this reprint, he focuses on the different spiritual perspectives of two Hasidic masters, the Baal Shem Tov (1700 - 1760) and Reb Menahem Mendl of Kotzk (1787 - 1859), known as the Kotzker. While the former brought light, inspiration, ardor, and ecstasy to Jewish mysticism, the later carried on an unstinting warfare against what he saw as the trivialization of the faith. In this regard, the Kotzker's dour personality and prophetic words mirror those of the Danish Christian theologian Soren Kierkegaard (1813 - 1855). Heschel respects the Kotzker's passion for truth but the earthy wisdom of the Baal Shem Tov seems much more relevant to our times.