I am a philhellene; to boot, I am philorthodox, and have been since, in 1961, I first went to Oxford's Orthodox Church (then in the sitting room of 1 Canterbury Road); met there Nicolas Zernov - him of the Theological tea-parties - and was introduced to a bespectacled young man called Timothy Ware.
In my second curacy, in south London, I was privileged by the close friendship of Christophoros (the future) Bishop of Telmissos, who, lacking a deacon, used me as a sort of mute but vested diaconal dummy during his Holy Week services. When Lancing was celebrating its 150th anniversary, we secured a long and very gracious Message from His All-Holiness Patriarch Bartholomew, which I directed to be solemnly processed up the Church at the Offertory, preceded by candles and incense. I have never lost my conviction that Byzantine Orthodoxy has great riches which it is our duty humbly and submissively to assimilate. For example, I share the view of Joseph Ratzinger that the West has never properly assimilated the iconological inheritance of the Seventh Ecumenical Council and his view that we Westerners should take on board the entire development of that tradition as laid out in a succession of councils which took place in an East separated from Rome down to a midsixteenth century Council of Moskow. And I am glad that S Gregory Palamas is on the calendars of Byzantine-rite Churches in full communion with the Holy See.
You will have sensed that there is a but coming. There is. In my Anglican days I was once criticised at Walsingham, in a public forum by a well-known Orthodox for having, in a Mass advertised as 'Anglican', said the filioque. I am afraid it made me feel combative. All the more so because it was the only negative uttered by any participant, in a conference including Presbyterian, Methodist, Reform, Anglican, 'Uniate', Orthodox, during the entire four days. My initial reaction was to think "I don't lecture the Orthodox on what they should omit from their Liturgy". My second reaction: "English Christianity has explicitly proclaimed filioque since at least the Council of Hatfield (680) recorded in Bede; an event more than a century earlier than the day when an Irish monk inserted it supra lineam in the 'Stowe Missal'; Hatfield was a Council presided over by an Eastern monk whom 'English Orthodox' claim as one of their own." (What price here the claims made by these Orthodox that "the Anglo-Saxon Church was Orthodox"?) And my final thought: " filioque is in our Articles, our Liturgy, and our Quicunque vult; if they want us to drop it they can jolly well ask us extremely nicely".
Intriguing (and characteristic) that Cardinal Ratzinger, in his Dominus Iesus, began with the Nicene Creed in Latin but without the filioque. It makes me all the sadder that the Orthodox national churches, as, I think, their recent Council demonstrated, seem to have very little interest in anything outside their own internal squabbles.
But, however abruptly they disown or disdain us (and even each other), we should stick firmly to the fine teaching in Ratzinger's Communionis notio that each of the dioceses of the separated Byzantine Churches is a true, if wounded, particular Church of Christ.
Gently sticking to this, even if it elicits no response, is true and Catholic 'Ecumenism'; so very much more so than the impulsive Gestepolitik of the current pontificate.