Rso-
“ I may be wrong, and if I am please cite non-Lubavich sources to set me straight, but I believe the above is a totally Lubavich concept, and quite likely a fairly recent one.”
The source I know is Tanya 36-37. I’m sure the more learned Lubavitchers could fill you in more.
Obviously there’s Medrash Tanchuma- that Hashem desires to have a dwelling place in this lower world.
That’s the basis.
“ The plan I believe in is that we are to keep Torah and Mitzvos solely because that is what Hashem wants, and by the way that will reveal his Elokus in the world. To the best of my recollection I have never heard that the plan has to do with Mashiach except in Lubavich circles.”
What’s the point of revealing Elokus in this world?……
It’s like saying I believe in dialing the exact phone number (but forgetting the point is to make a call😀)