MA
The second perek of chagiga discusses Kabbalah in the form of maaseh bereshis and maaseh mercova.
If you learn it you will note that some Tanayim are told by their Rebbe that they aren’t ready to learn Kabbalah yet
I find it interesting that so many people these days feel a desire to learn something that clearly only has meaning to a select few.
I have often wondered if this is the work of the yetzer hora. Perhaps the yetzer hora, when he sees someone with a desire to learn, attempts to channel that desire into something that has less meaning for the person.
On a personal note, whenever I have a desire to learn Kabbalah I remind myself that I don’t want to die an am ha’aretz and open a mishna brura.