A spiritual master of our own times, Rabbi Abraham Isaac Kook was the Chief Rabbi of Palestine prior to the establishment of the State of Israel. Rabbi Kook represents the most significant renewal of the Jewish mystical tradition in modern times. This volume presents to the English reader the major expressions of hist thought, and a biographical sketch sums up his basic teachings. Ben Zion Bosker observes that, 'Rabbi Kook's thought was dominated by two primary concepts, particularity and universality...Born into the restricted world of the Jewish ghetto in Eastern Europe, he was in constant rebellion against all that restricts and narrows the human spirt...'.