Book excerpt: Whether you realize it or not, you are the beneficiary of centuries of careful study and reflection on God's Word. The writings and teachings of figures from the past are crucial to what the church believes today. But just like intriguing guests of honor at a dinner party, these theologians can be intimidating to get to know. Introducing you to the lives and thought of figures such as the Apostolic Fathers, Justin Martyr, Augustine, Thomas Aquinas, Martin Luther, John Calvin, Karl Barth, and others, this book makes the writings of these significant theologians accessible and approachable—opening up for you the riches of church history and enlarging your vision of God and his plan for the world.