Answer:
   
   The Kabbalah deals with sensitive topics and the knowledge it offers
   has been warped, even within the Jewish community. This resulted in
   severe disruption of the Eastern European Jewish community (for
   example, the false messiah Shabbtai Tzvi and the Frankists). As a
   result, the non-Chassidic sages placed a ban on the study of three
   basic texts until the age of 30, until the age of 40 for general
   study, and in all cases until one has studied the more basic Jewish
   sources (Tanakh, Talmud, Halacha) in depth. However, in Sephardic and
   Chassidic communities, some basic texts are studied even by young
   folks.

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