This is also the reason why Matan Torah specifically related to simple things because the ‘Hamshocho’ of Hashem’s ‘Atzmus’ is extended into the lowliest and the most simple of things.
The Alter Rebbe writes in Tanya (Chapter 36): The purpose of the Hishtalshelus of the worlds, and of their descent from level to level, is not for the sake of the higher worlds, since for them this constitutes a descent from the light of His Countenance. The very word “world” (עולם) in Hebrew denotes concealment. Thus, even the highest worlds constitute, by their very existence, a descent from the pervading level of G dliness that preceded their creation. It is illogical, then, to say that the revelation which these higher worlds represent is the purpose of the Hishtalshelus, since their revelation is actually concealment — and the ultimate purpose of creation lies in revelation, not concealment. Rather, the purpose of Hishtalshelus is this lowest world. All the higher worlds are merely steps in the descent of the Divine creative power; in each of them the light is veiled yet further, until it is finally reduced to the minute degree of revelation that this physical world is capable of receiving. Thus, the purpose of the Hishtalshelus is this world, for such was His will — that He find it pleasurable when the Sitra Achra is subjugated to holiness, and the darkness of Klipah is transformed into holy light, so that in the place of the darkness and Sitra Achra prevailing throughout this world, the Ein Sof-light of G d will shine forth with greater strength and intensity, and with the superior quality of light that emerges from the darkness i.e., when darkness is transformed into light, the resulting light is superior to ordinary light; it will thus shine with greater intensity than its radiance in the higher worlds. There, in the higher worlds, it shines through garments and [through] concealment of the Countenance (a concealment of the P’nimiyus — i.e., the internal aspect — of the light) which conceal and screen the Ein Sof-light, so that [the worlds] do not dissolve out of existence. For were the Ein Sof-light not screened by garments, the worlds could not bear it, and would dissolve. Thus, the revelation wrought by subjugation of the Klipos in this world, is greater than that of the higher worlds; there the Ein Sof-light is hidden, whereas here in this world it is revealed in all its strength.
