It would be impossible to give even a cursory sketch of the Cabbala without diving down deeply into the intricacies of abstruse systems, without touching upon questions which require the most minute care of the specialist. A history of the Cabbala and its systems, of its various manifestations, applications, and in?uence, however exhaustively treated in detail, would, at most, elucidate one side of the question only. Another aspect would have to be investigated which would command a much higher interest. The purely human question would have to be entered into, and an attempt made to under stand the workings of the intellect and the emotions, the interaction of religious thought and religious feeling, the wonderment at that which surpasses human intelligence and the craving to grasp its import, ethical principles and yearnings of the heart, which one and all are instrumental in calling forth the manifestations of man's mystical instincts.