An additional point
I might add to this that for the Orthodox Holy Scripture is, whilst being a central part of Holy Tradition, just that - a part and not the whole. Because Christ founded a Church and because we know what is and is not Scripture through it, we lean also upon those other survivals of the early Church: the works of the Fathers (whose citations of what was and was not considered Scripture was one of the ways the Church came to know what was an was not Scripture); the ancient liturgies (and for the Orthodox the way we worship is the expression of our theology); and the decisions of the first three Councils, are all part of a seamless web.
To take one example, although the Holy Scriptures tell us that baptism was in the name of the Father, the Son and of the Holy Spirit, and that Christ said He and the Father were one, it no where uses the word 'Trinity', neither does it tell us anything about the nature of the Holy Trinity; for that we have to look at the Nicene Creed formulated at the Council of Nicaea in AD 325, and at the works of the Cappadocian Fathers, and of St. Athanasius.
From our perspective, the mistake Protestants seem to make with the Bible is to treat it as though it were the only revelation which God had made to us, when it is a revelation made plain by the Church founded by Christ. That being so, we need the Church to fully illuminate the Bible. Although Protestants often talk about how they have rejected the Pope and his infallibility, they seem often to claim for their own reading of the Bible and infallibility way beyond the limited claims made by the Papacy.
In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins. (1 John 4:10)