Oh, I'm not asking because it threatens my belief.
I just wanted to understand you.
And if you have no interest in understanding what I said about Mary, that's ok too - no point in forcing anything. It was really something I was more interested in though.
But as a matter of fact, I was discussing your question about Christ being "begotten" at the end of our last class at Church. Well, I should say I mentioned it. I was actually questioning something else in the Creed, but I know the Orthodox consider Christ to be co-eternal with God, so I knew I didn't need to clarify that "begotten" doesn't imply that Christ came along later, just as the Holy Spirit "proceeding" from the Father does not imply that HE came along later either.
You ask when was Christ begotten? I can't answer that. I do want to go into it further. I think it's in an eternal sense? I don't believe there was a "day" or "time of day" that He was begotten. The Creed says it was before the world. So it does not refer to the Incarnation.
However, Christ WAS born of the Virgin Mary, and was conceived of the Holy Spirit. That was a definite moment in time. But that was the incarnation, not His point of origin. I don't consider that to be His having been "begotten" (though I used to).
You said:
I'm sorry, I don't understand what you are asking here?
At any rate, you are now saying that Jesus Christ was always the Son of God? So I don't see a point of disagreement there.
As far as the word "incubation" referring to His entire life ... lol in terms of Jesus Christ, regardless of what you meant, yes I suspect there is a better word.

But I won't offer once, since I'm not sure what you mean. Unless it's simply that His role changed?
Scripture does tell us that He ascended to heaven, sat down at the right hand of the Father, and ever lives to make intercession for us, that He has a role as our high priest. So if you mean that was the beginning of that role, as far as I can tell, Scripture agrees with you. I don't recall it being mentioned in the OT, but I've never looked into it. I wouldn't disagree with you with the understanding I have right now though. If that's what you actually mean?