In Rabbi Berel Wein's Herald of Destiny: the story of the Jews in the medieval era , 750-1650 (pg. 237-38) in a section called The Influence of Kabbalah we read:
The spread of Kabbalah was not restricted to the Jewish people. During the Renaissance, Christian scholars exhibited great interest in Kabbalah. . . . Thus Kabbalah became a dominant strain of thought in Protestantism in the sixteenth and seventeenth centuries. . .Actually there's nothing undiscernible [sic] about it. It is precisely for the same reason that Kabbalah so frustrates pashtanim: it's very congenial for making stuff up. Or to put it another way -
33 . . . For reasons undiscernible to later generations, early Protestantism was convinced that Kabbalah would vindicate the truths of its version of Christianity.
The Catholic mystic William Postel (whom I blogged about here, who was partially responsible for the very first printing of the Zohar) published a Kabbalistic broadsheet which he called אור נרות המנורה. Postel:
Here is the heading of אור נרות המנורה:
And here are the opening words:
There you have it: התורה כלה היא סוד ודרך משל מהדברי' העליונים כאשר נגלה ונראה למרע"ה בהר סיני. The Torah is entirely a mystery and allegory consisting of esoteric matters revealed to and by Moses at Sinai. This is the crux of the matter.