I'm wondering if, since they use a slightly different Bible than Evangelicals use, if this is why some of their doctrine is vastly different from the Evangelistic belief system. That can't be the only explanation though since Roman Catholics (RC) use the KJV (I think) but, their beliefs are also very different from Evangelicals. I suppose the reason for this is that the EOC and RC alike, say that they adhere to Church Tradition as much as they say they follow the written words of the Bible. Fascinating! So many religions, so many perspectives. I love "peering in the door" and investigating! What do you know about the EOC?
Some differences in doctrine may derive from a different biblical canon and/or a different text for their Old Testament. But I suppose a big piece of it is that Eastern Orthodoxy grew and developed in different times and different cultures than Evangelicalism did. Different cultures and different eras frequently think differently from each other.
Roman Catholics have their own bibles, including: the Douay-Rheims
; the New American Bible
; the Jerusalem Bible
; the New Jerusalem Bible
; and the Christian Community Bible
. The NRSV has also been published in a Catholic edition; and in an edition that includes not only the Catholic apocrypha, but also additional texts found in Eastern Orthodox bibles.
Eastern Orthodoxy is a fascinating sector of Christianity. It can be worth exploring in a number of respects, but I particularly recommend reading about the concept of theosis
A standard introductory text to Eastern Orthodoxy is Timothy Ware's The Orthodox Church
. You also might find Peter Gillquist's book, Becoming Orthodox
, interesting. It tells the story of a bunch of former Campus Crusade sorts who migrated into Eastern Orthodoxy. In a similar vein, Francis Schaeffer's son converted to Eastern Orthodoxy; I once heard him speak (in Medford, of all places).