Martin Chemnitz

This doctrine of Christ and of the apostles, from which the true faith of the primitive church was received, the apostles at first delivered orally, without writing, but later, not by any human counsel but by the will of God, they handed it on in the Scriptures.

What's really neat about the Orthodox church is that it's like walking back in time 2,000 years to the time of the Apostles, when they created these services. You walk into that and it's really like... living it. They have maintained the truth ever since the beginning.