The doctrine of tzimtzum teaches that HaShem contracted Himself to create a space within which to create creation. "Prior to Creation, there was only the infinite Or Ein Sof filling all existence. When it arose in G-d's Will to create worlds and emanate the emanated ... He contracted (in Hebrew "tzimtzum") Himself in the point at the center, in the very center of His light. He restricted that light, distancing it to the sides surrounding the central point, so that there remained a void, a hollow empty space, away from the central point ... After this tzimtzum ... He drew down from the Or Ein Sof a single straight line [of light] from His light surrounding [the void] from above to below [into the void], and it chained down descending into that void. ... In the space of that void He emanated, created, formed and made all the worlds. — Etz Chaim, Arizal, Heichal A"K, anaf 2".
This teaching directly contradicts Malachi 3.6 which states that "HaShem does not change." That is, before creation all there was was HaShem. Since creation all there is is HaShem (Ayn Od Milvado); that is, HaShem is Eternally the same at all times and in all places. There is also the passuk (verse) Tehillin 90.1 "A Prayer of Moses the man of G-D. Lord, Thou hast been our dwelling-place in all generations."
Shlomo Elyashiv writes: "I have also seen some very strange things in the words of some contemporary kabbalists who explain things deeply. They say that all of existence is only an illusion and appearance, and does not truly exist. This is to say that the ein sof didn't change at all in itself and its necessary true existence and it is now still exactly the same as it was before creation, and there is no space empty of Him, as is known (see Nefesh Ha-Chaim Shaar 3)."