For quite some time I have noticed a link between the Babylonian Captivity (specifically Jeremiah 29) and the life and mission of the church as sojourners seeking a city that is to come. I have neither been able to clearly articulate my thoughts nor have I dedicated time to study this issue in depth but to our benefit Tim Keller has. His advance paper for The Third Lausanne Congress on World Evangelism, in Cape Town, South Africa, provides a very helpful explanation of why we must understand Israel’s captivity as paradigmatic for the New Testament church. The paper is quite brief and I hope it is of great benefit to you. It is available as a PDF or in HTML.