Due to the danger of impure material analogy, Kabbalists traditionally restricted oral transmission to close circles, with sincere motives, advanced learning and elite preparation, while also seeking possible dissemination from the 16th century to further Messianic preparation. Understanding Kabbalah through its unity with complete mainstream Talmudic, Halachic and philosophical proficiency was a traditional prerequisite to avoid the false dangers. They attributed 17th-18th century Sabbatean mystical heresies to false corporeality of Kabbalah through unworthy motives. Later Hasidic thought saw its communal popularisation as a safeguard against esoteric corporeality, by its new internalisation of Jewish mysticism through the psychological spiritual experience of man.
^"I believe with perfect faith that the Creator, Blessed be His Name, has no body, and that He is free from all the properties of matter, and that there can be no (physical) comparison to Him whatsoever," Maimonides' 3rd principle of faith
^"The Lurianic Kabbalah was the last religious movement in Judaism the influence of which became preponderant among all sections of Jewish people and in every country of the Diaspora, without exception." Gershom ScholemMajor Trends in Jewish Mysticism 3rd edition 1955, Thames & Hudson, pages 285-6