The Opposition to the Study of the Wisdom of Kabbalah
But if, God forbid, it is to the contrary, and a person from Israel degrades the virtue of the internality of the Torah and its secrets, which deals with the conduct of our souls and their degrees, and the perception and the tastes of the Mitzvot with regard to the advantage of the externality of the Torah, which deals only with the practical part? Also, even if one does occasionally engage in the internality of the Torah, and dedicates a little of one’s time to it, when it is neither night nor day, as though it were redundant, by that one dishonors and degrades the internality of the world, which are the Children of Israel, and enhances the externality of the world – meaning the Nations of the World – over them. They will humiliate and disgrace the Children of Israel, and regard Israel as superfluous, as though the world has no need for them, God forbid.
– Baal HaSulam, “Introduction to The Book of Zohar,” Item 69
Kabbalists About Studying Kabbalah, Part 13