The good folks at Plough have produced an e-book featuring two early Christian texts, and Rowan Williams has written an introduction to it that I believe essential reading for Christians in our moment. I love this kind of piece — a clear and patient exposition of ideas from the past that never once mentions current events but brilliantly illuminates the questions that face us. Please do read it all, but here are some choice nuggets: 

• “If you look at the eyewitness accounts of martyrdom in these early centuries – ­documents like the wonderful record of the martyrs of Scilli in North Africa in AD 180 – you can see what the real issue was. These Christians, most of them probably domestic slaves, had to explain to the magistrate that they were quite happy to pray for the imperial state, and even to pay taxes, but that they could not grant the state their absolute allegiance…. What made their demand new and shocking was that it was not made on the basis of ethnic identity, but on the bare fact of conviction and conscience. For the first time in human history, individuals claimed the liberty to define the limits of their political loyalty, and to test that loyalty by spiritual and ethical standards.”  
• “The early Christian movement … was not revolutionary in the sense that it was trying to change the government. Its challenge was more serious: it was the claim to hold any and every government to account, to test its integrity, and to give and withhold compliance accordingly. But it would be wrong to think of this, as we are tempted to do in our era, in terms of individual conscience. It was about the right of a community to set its own standards and to form its members in the light of what had been given to them by an authority higher than the empire. The early Christians believed that if Jesus of Nazareth was ‘Lord,’ no one else could be lord over him, and therefore no one could overrule his authority.” 
• “The theology of the early centuries thus comes very directly out of this one great central conviction about political authority: if Jesus is Lord, no one else ultimately is, and so those who belong with Jesus, who share his life through the common life of the worshiping community, have a solidarity and a loyalty that goes beyond the chance identity of national or political life…. Humans love largely because of fellow-feeling, but God’s love is such that it never depends on having something in common. The creator has in one sense nothing in common with his creation – how could he? But he is completely free to exercise his essential being, which is love, wherever he wills. And this teaches us that we too must learn to love beyond the boundaries of common interest and natural sympathy and, like God, love those who don’t seem to have anything in common with us.” 
• “One of the lasting legacies of the early church, then, is the recognition that doctrine, prayer, and ethics don’t exist in tidy separate compartments: each one shapes the others. And in the church in any age, we should not be surprised if we become hazy about our doctrine at a time when we are less clear about our priorities as a community, or if we become less passionate about service, forgiveness, and peace when we have stopped thinking clearly about the true and eternal character of God.”