You need to have a clear picture of God and if you are going to know whom you are walking with, Gracia. The reason why Hellenic metaphysics were brought into the church is that the Bible does not at all provide a unified account of God. It's not enough just to say you believe in God, you need to be more specific, say what kind of God you believe in. So , yes, you need to have a clear idea of what the Trinity is claiming. Is it claiming, for example, that God is a cosmic society of three separate, unique personalities? Does the one God simply mean they all are working together in harmony? That is what the social theory says. Ok, but how then is this anything other than polytheism? See what I mean? No metaphysical considerations, no clarity. Of course, the Apostles may have had a simpler faith, though I doubt it was as simple as you think. The early church, for example, was caught in a major conflict over the Trinity, specifically over the Deity of Christ. Is the divine that rules in heaven identical with the divine that makes its presence felt on earth? If you think the Bible provides simple answers, forget it. Both the Trinitarians and the anti-Trinitarians used Scripture to back their positions. If I had a nickel every time I heard some anti-intellectual Christian say they have no need of metaphysics, they know Christ and that's enough and then they turn right around and describe the God of the creeds, confessions, and church fathers, I'd be a rich man. Tine and again I hear all this nonsense about how one has some "personal" relationship with a "personal God', doesn't need any metaphysics, etc. However, when they come down to describing this "personal God," the latter is anything but a person. Rather, they affirm the God of classical theism, the God of the church fathers, creeds and confessions. That isn't a very personal image of God at all, as the classical model claims that God is void of body, parts, passions, compassion, wholly immutable. So, yes, metaphysical considerations are important to take into account, as they are constantly in play.
