The orthodox faith has since the Second Ecumenical Council officially believed that God the Father is without a cause, unbegotten of anything, and not dependent on anything for his existence, whereas the Son and the Spirit are caused by the Father and exist because of him, whereas he does not exist because of them.
Alright, if the Son and Spirit can both be caused, come into existence, AND be eternal all at the same time, then this faith is definitely too hard for me. :) It's interesting to study though.
No it's not . Its really quite simple. The Greek of the Creed makes it clear Christ was "τὸν ἐκ τοῦ Πατρὸς γεννηθέντα πρὸ πάντων τῶν αἰώνων·", begotten from the Father before all ages. You've prayed that hundreds of times, no doubt. Eternity is a time concept. It is by necessity limited by the expanse of time, the full expanse of time, but limited nevertheless. Christ and the HS "are" beyond or outside any limits of time. This is understandable if one accepts, as I believe most Protestants do, that our Triune God is Ο ΩΝ, the creator of the fact of Existence itself. That the Son "τὸν ἐκ τοῦ Πατρὸς γεννηθέντα" and the Spirit "τὸ ἐκ τοῦ Πατρὸς ἐκπορευόμενον" (I love that word! It rolls off the tongue!)in no fashion limits their "eternal" attribute. There was never a time when either of Them "was not".
See...you knew this all along. You were just thinking about it in more anthropomorphic and concrete terms than we do.
But believing in talking snakes and donkeys and dead people getting up and walking away is not? :)