The truth of the very beginning, the thing, and the NO-thing. It's kind of hard to explain [...]
I understand, I think, that you're talking about the "
Ain Sof", the "No-Border", "No-End", "Infinite", coming to Existence (
be it through the "Zimzum" [Luria] or simply[?] by creating the "Adam Kadmon" from which then the Sephiroth emanate), right?
These are ideas, that I find intriguing and even intuitively accessible.
[sic!]
Also, I would say, that these very ideas, that I've just mentioned, do not collide (much?) with the common Jewish doctrines about the ONE God (in the middle-ages, where Kabbalah started). If I might say so.
I guess, if the Kabbalah's claims about the very VERY beginning wouldn't go further than that, it might not have been recognized as something special or much different.
Remarkably the Hermetic Kabbalah (where I came from initially) doesn't go back further indeed. Inside Hermetic Kabbalah, everything behind the border of Kether (the "Non-existing-Existence", the "Ain Sof") can Not be specified (or talked about in other than negative terms; similar to Plotin's "The One"-entity).
BUT:
The original Jewish Kabbalah went beyond that!
Who would ever thought?
By that, I'm referring especially to the "ZOHAR", namely the "
Sitre Torah" about "Bereshit" (
"In the beginning" = the very start of creation / the beginning of the book of "Genesis")
[in any 3-volume-edition of the "Zohar", the whole part should be found in: Vol.1 / leave 15a till 22a]
There we find claims - referring to the very first words of creation "Bereshit bara Elohim ..." - that
even God (as WE know Him! - by His name "Elohim")
has been created. And he has been created through "Bereshit", the "beginning" [of course by HIM, the ONE true God].
This idea even goes back, at least, to the first (or second, depending on your answer to the question, if the "Sefer Jezira" is a kabbalistic or proto-kabbalistic work) book of Kabbalah:
The "
Sefer Bahir".
In its §8 we find the statement, that the VERY first thing, that He has created, has been, what the universe needs [according to Gershom Sholem's comment on the Bahir, which was his PhD, this means the Torah], and then God [Elohim] and then heaven and land.
If I might say so.