Hmmm...I wish Bishop Kallistos got into more details, but I guess I'll thoroughly review the 6th and 7th Centuries to find out...in any case, I was trying to look for some sources, but I don't go to St. Vlad's, so if anyone has these, I would really appreciate it. I'm going to give them in a message I sent to a Greek Bishop, who's probably really busy to reply sooner:
Dear Your Grace,
There's this one article that is very interesting, by Rev. John Behr. Here's the source:
"Reflections on the Question of Episcopal Celibacy," St Vladimir's Theological Quarterly 36:1-2 (1992) 141-9.
I also looked up the canons in the Council in Trullo, although EO, yet was interested to read what it has to say. While one of the canons does seperate a bishop from his wife, it implies that celibacy was not a prerequisite in the Byzantine Church (and Rome at the time) for the Episcopate office.
What intrigues me is that both EO and OO traditions hold that the Bishopric has to have been a monk, or at least celibate before episcopal ordination, but I can't find where this tradition comes from. Perhaps the strong monastic movements in the early Nicene centuries, but the Council in Trullo, in a way still brings the thought of tradition that episcopal celibacy was required, but celibacy before that was not.
I would also like to look at these:
"The Council in Trullo: Issues Relating to the Marriage of Clergy," Greek Orthodox Theological Review 40 (1995), 183-199
(John H. Erickson)
And the following articles by Most Reverend Peter (L'Huillier)
"Mandatory Celibacy as a Requirement for Episcopacy: The Council 'In Trullo'," Greek Orthodox Theological Review 40 (1995), 213-219
"Reflections on Episcopal Celibacy: A Rejoinder to John Behr," St Vladimir's Theological Quarterly 36 (1992), 149-151
"Episcopal Celibacy in the Orthodox Tradition," St Vladimir's Theological Quarterly 35 (1991), 271-300
"Clerical Celibacy," Eastern Churches Review 3 (1971), 268-276
And perhaps, by the same author, I would like to look at this one, that my answer my personal question as well that pertains to the Orientals:
"Canonical Traditions of the Orthodox Church and the Oriental Churches," Greek Orthodox Theological Review 16 (1971), 163-172
I know you're probably can't get all these articles, but if you can get at least the first article by Fr. John Behr and Archbishop Peter's reply ("Rejoinder") to that article.
Thank you Your Grace.
So St. Vlad people, wishing you do all you can to share
PS Perhaps, the Council in Trullo caused the selection of monks for bishops due to rarely anyone who would seperate himself from his wife.