This article accompanies the fable
The Symbolists all had trouble living in the real world and their writing was fueled by hopeless love affairs and petty resentments. The leading Symbolist poet of the time, Alexander Blok, was dead by 1921, Bruisov was dead by 1924 and Petrovskaya committed suicide in Paris in 1928 and it can't all be blamed on the 1917 Revolution. Bely, who wrote his masterpiece Petersburg in 1913, lasted the longest, dying in 1934. (Bely has been described as a mystical holy fool in the tradition of Russian Orthodoxy, like in these Mikhail Nesterov paintings.)
The Fiery Angel doesn't have the sense of humor or the wings of imagination that The Master and Margarita does, relying instead on demonic possession in 16th century Cologne. In other words, Bruisov believed in most of the magical and occult nonsense he wrote about. Like Bulgakov's novel, Satan puts in an appearance, there is a flight to a witches sabbat and a black mass and orgy but it's missing Bulgakov's exquisite irony. I have to believe Bulgakov had read The Fiery Angel.