Since there seems to be speculation around the internet, I figure I’ll briefly clarify my own beliefs.
I am a Christian. That comes through in the lyrical themes, but Epta Astera is not an explicitly evangelistic tool. Though that has its place, I think the efforts of Christians to penetrate secular markets has for the most part just led to more cultural balkanization. For example, the Christian Metal scene that is separate both from the wider metal culture and wider Christian culture. I just like to make music, knowing that God will be glorified as he chooses to be, and aiming to be a part of that as a vessel of mercy, not a vessel of wrath.
As for the particulars of my beliefs, though I enjoy their music very much (obviously), I am neither Catholic nor Eastern Orthodox. I am Protestant – specifically Reformed/Calvinist. If you’re interested, you can read my thoughts on my faith here.