If you are like me your experience with and knowledge of Eastern Orthodoxy is limited. I grew up Catholic so I understand Roman Catholicism. To many Protestants the Eastern Church is quite mysterious. Rare are the books by Protestants about Eastern Orthodoxy. Robert Letham has written a good book to help people like me understand our brothers and sisters from the East. In this day, with increased persecution in places like Iraq and Syria we hear more about Eastern Orthodoxy. The vast majority of them are not Protestant but either Catholic or Eastern Orthodox.
Letham’s book, Through Western Eyes, is not a polemical book. His purpose is not to expose the errors of Eastern Orthodoxy. He does compare and contrast its teaching on various doctrines with both Roman Catholicism and Reformed Theology. Why just Reformed Theology (and a bit of Luthernism)? Like Roman Catholicism it is a confessional faith. Much of evangelicalism shuns creeds and confessions therefore exhibiting a wide variety of beliefs. Letham himself also comes from a Reformed perspective and therefore compares it to what he knows and loves best.
Letham structures the book in 3 sections: history, theology and evaluation. The third section is not very long. In it he seeks to point out areas where we could learn from them, where they could learn from us, gross misunderstanding and divergence.
The section on theology spends much of its pages dealing with the ecumenical councils. How they do theology is quite different than how we have done theology. Since the Scholastics and particularly since the Enlightenment theology in the West has been done in the universities, and not necessarily in the church. There have been numerous confessions and catechisms to lay out theology as well as many systematic theology books. Theology in the Eastern Church is grounded on the Councils (which we also affirm for the most part), communicated in their liturgy and is done mostly by church men: pastors and bishops. Their dependence on the creeds reflect their understanding of polity: there is no hierarchical structure. The Patriarchs do not function like archbishops or the Pope. How their theology developed is interesting, at least to me.