- What do you mean? Can you tell more detailed about this? Can you tell me a little more about this? For example: Does every jude have more or less contact with the kabbalah? Is the kabbalah an actual book, or an philosophy? Who have wrote it? Why is it so popular with judes?
Kabbalah is the collective name we give to a number of related systems of Jewish mysticism. All of these schools of mystical thought have multiple books-- sometimes very many books-- associated with them, and usually have subgenres and sub-schools of thought within them.
While traditionally certain works of Kabbalah were ascribed to great figures of the past-- Adam or Abraham or Solomon or suchlike-- modern scholarship confirms that the majority of the Kabbalah studied today dates from the medieval period and just afterward, mostly from the eighth or ninth century CE to the sixteenth century, though there are extant works of Kabbalah from earlier than that, and mystical references abound in the Talmud. Likewise, there are a couple of significant works of Kabbalah from the seventeenth and eighteenth centuries, but the greatest works of Kabbalah are medieval and sixteenth century.
Initially, our mysticism was fairly esoteric. In later times, like say, by the medieval period, it began to be more widely known amongst our scholars and among well-educated people. When the movement of
Chasidism arose in the Eighteenth century, one of the things it did was to make mystical teaching more accessible to common people. Again today, with the advent of the Jewish Renewal quasi-movement, there is beginning to be a push toward making mystical teaching more accessible to common people, including Jews lacking in traditional textual learning and Hebrew/Aramaic skills.
That said, Kabbalah remains relatively esoteric in its original textual forms outside the Orthodox world, since non-Orthodox Jews tend to be less Jewishly educated than Orthodox Jews, and to have less skill with Hebrew. There certainly are some non-Orthodox Jews who study Kabbalah seriously, in the original textual forms-- myself included-- but we are relatively few in the non-Orthodox world, as opposed to many in the Orthodox world who learn at least a little Kabbalah, or teachings influenced by Kabbalah.
As to why the Jews who study Kabbalah find it compelling, that is a more difficult question to answer. In part, it probably depends on the school of Kabbalistic thought they prefer, and the works they study most intensely, since different schools of Kabbalistic thought tend to have different agenda, and the works within those schools of thought all the more so.
In general, the "purpose" of Kabbalah (if we can generalize and oversimplify enough to say one exists) is to get a better understanding of God, the universe He created, how everything functions, and how we can use such knowledge to become more spiritually aware, more effective in our observance of the commandments and our understanding of Torah, and more effectively contribute to making the world a better place.