qui ex patre filioque procedit

Bill at Pro Deo et Patria quotes an interesting comment from John Allen in his latest Word from Rome:

Fr. Johannes Grohe, an Opus Dei priest who teaches church history at Santa Croce, spoke on the history of church councils. He offered several interesting nuggets, such as the fact that a regional council in Persia in 410 produced one of the earliest insertions of the famed "filioque" clause into the Creed, specifying that the Holy Spirit proceeds from the Father "and from the Son." This council, as Grohe points out, was an Eastern affair, and its adoption of the filioque came out of the rich theological reflection of early Persian Christianity. Hence the notion that the filioque is solely an imposition of the medieval Western Church upon the East, born of later controversies between Rome and Byzantium, is historically dubious.

Interesting! I agree with Bill that this could have a very positive effect on current Catholic/Orthodox dialogue. But it will be interesting. I sincerely hope that this is treated seriously. Ut Unum Sint!