There is a kind of proof that mysticism, as interesting as it might be, leads to the destruction of one's soul. This ironically enough is from the Ari [Rav Isaac Luria himself]  There are three books that explain verses of the Torah from the Ari written by Rav Chaim Vital. At the end of the Torah on the verse יערוף כמטר לקחי [my doctrine will pour/murder like rain] refers to those that learn mysticism before having fulfilled all the conditions of fasting and separation from this world, and also having finished the two Talmuds in depth.

[Is there a solution to this problem? I am not sure. The Shelah [Shnei Luchot Habrit] brings the idea one should not stroll in Pardes unless he has spent most of the day in Gemara.