"The most controversial doctrine associated with him, the filioque, was rejected by the Eastern Orthodox Church."<p><a href="https://en.wikipedia.org/wiki/Filioque" rel="nofollow">https://en.wikipedia.org/wiki/Filioque</a><p>I wonder how much ordinary people over the thousands of years in the Western Churches and the Eastern churches care about this sort of stuff.<p>And today we think internet fandom nerd rages and so on are bad....but the modern day nerdy internet forum rage over minutia of anime and other stuff is similar to the doctrinal rage and discussion like the Filioque.<p>The word fandom comes from fan which comes from fanatic. And many nerdy things like gaming and superheroes and so on seem to operate on the same level as religion in the minds of people in terms of the neural pathways and you get the same effects perhaps...<p>EDIT: I forgot to say what filioque is. From the wikipedia article:<p><i>Filioque , a Latin term meaning "and from the Son", was added to the original Nicene Creed, and has been the subject of great controversy between Eastern and Western Christianity. The term refers to the Son, Jesus Christ, with the Father, as the one shared origin of the Holy Spirit. It is not in the original text of the Creed, attributed to the First Council of Constantinople (381), which says that the Holy Spirit proceeds "from the Father" (Greek: τὸ ἐκ του Πατρὸς ἐκπορευόμενον) without the addition "and the Son"</i>