Some western churches claim to base their theology on Scripture alone. Others stand at the opposite extreme, and claim the entire cumulative tradition as the basis for doctrine. Similarly, the sacramental theology of the Orthodox Church, as opposed to the details of practice, would seem strangely familiar. The Eucharist is viewed as, above all, a celebration of the victory of Christ over sin, death, and the devil. All Christians believe in the life, death, and resurrection of Jesus, the anointed Son of God, and that these are somehow the means by which the human race is put right with God the Father.
Theology seeks to interpret and explain that Somehow.
Here Orthodox Christianity diverges from virtually all Western Churches. For example, consider their respective understanding of the person of Christ. A similar contrast informs worship east and west. In other words, again, our theosis. A special example of the difference between western Christianity and Orthodoxy is their respective attitude towards visual aids in worship.