From the early Kabbalists, Adam and Abraham, through the writing of The Zohar and up to the Middle Ages, Kabbalah was primarily passed through word of mouth. Kabbalists primarily shared their spiritual experiences with each other as they discovered the Upper Worlds. At the same time, Kabbalists prohibited the study of Kabbalah from people who had not been prepared for it. They treated their students cautiously, to ensure that they studied in the proper manner, and they intentionally limited the number of students. Although we have made the point that Kabbalah study is open to all, we have not related how important the study of Kabbalah is today. To Kabbalists, in fact, wide dissemination of the wisdom of Kabbalah is a must. That, as much as anything else, accounts for the tremendous interest in Kabbalah today...