Yeah, it's a mystery and I don't really know the full answer. I know that it's eternity and outside of our understanding. I have heard somethings about how time and earth viewed from eternity is everything is constantly and forever happening. This is reflected in Church services, prayers, and Divine Liturgy as events of the Gospel are taking place, not just that they happened once.

I will say it's funny that you're so against Holy Tradition but will mention Enoch. Jesus and the Apostles quoted Enoch which wasn't part of their scripture.