I'm sorry to ask a source-seeking question (because I don't like seeing them myself), but I'm at a loss here in trying to find what I think is a theologically important Hassidic story. The story goes something along the lines of, "the Rambam paskened that no Jew is allowed to believe that God has a physical form, and hundreds of piuospious people were evicted from Heaven, until the Raavad came along and paskened that they were allowed back in". I remember seeing this somewhere (perhaps a scholarly publication on theology) but cannot, after many attempts, find it anywhere.
And, no, I'm not confusing it with the story of the Kotzker, who said that the Rambam paskened the sheidim out of existence.