In light of the chassidishe yom Tov of yud tes Kislev, I have listened to more shiurim on Chassidus and realized that really the two points of Chassidus Chabad I wrote above, Ain Od Milvado and Dirah Btachtonim, are one and the same.
The Alter Rebbe’s mission was to bring the moshiach reality down into this world, into sechel. Moshiach reality is that we will, with our physical flesh, be able to see Hashem. Vnigle kvod Hevaya vruu kol bosar yachdav etc.
Something that sounds impossible!
So Dirah Btachtonim means that this impossible becomes normal to us. And that’s why starting the from the Alter Rebbe, Chassidus Chabad has taken Or Ain Sof and brought it from merely being in the realm of Emuna (and thus not as real a part of us) into the realm of sechel. May we soon greet moshiach! A gut Yom Tov everyone! Lshana toiva belimud Hachassidus uvdarchei Hachassidus tekoseivu vseichaseimu!