I still always felt a want which I was not able to fill. I could not completely satisfy my desire of scientific knowledge. Up to this time the study of the Talmud was still my chief occupation. With this however I found pleasure merely in view of its form, for this calls into action the higher powers of the mind; but I took no interest in its matter. It affords exercise in deducing the remotest consequences from their principles, in discovering the most hidden contradictions, in hunting out the finest distinctions, and so forth. But as the principles themselves have merely an imaginary reality, they cannot by any means satisfy a soul thirsting after knowledge. I looked around therefore for something, by which I could supply this want. Now, I knew that there is a so-called science, which is somewhat in vogue among the Jewish scholars of this district, namely the Cabbalah, which professes to enable a man, not merely to satisfy his desire of knowledge, but also to reach an uncommon perfection and closeness of communion with God. Naturally therefore I burned with desire for this science. As however it cannot, on account of its sacredness, be publicly taught, but must be taught in secret, I did not know where to seek the initiated or their writings. CHAPTER XIV. I study the Cabbalah, and become at last a Physician. Cabbalah,--to treat of this divine science somewhat more in detail,--means, in the wider sense of the term, _tradition_; and it comprehends, not only the occult sciences which may not be publicly taught, but also the method of deducing new laws from the laws that are given in the Holy Scriptures, as also some fundamental laws which are said to have been delivered orally to Moses on Mount Sinai. In the narrower sense of the term, however, Cabbalah means only the tradition of occult sciences. This is divided into _theoretical_ and _practical_ Cabbalah. The former comprehends the doctrines of God, of His attributes which are expressed by means of His manifold names, of the origin of the world through a gradual limitation of His infinite perfection, and of the relation of all things to His supreme essence. The latter is the doctrine which teaches how to work upon nature at pleasure by means of those manifold names of God, which represent various modes of working upon, and relations to, natural objects. These sacred names are regarded, not as merely arbitrary, but as _natural_ signs, so that all that is done with these signs must have an influence on the object which they represent.