Open-mindedness is often celebrated in our modern world--yet the habit of open-mindedness remains under-defined and may leave Christians with many questions. Is open-mindedness a virtue? What is the value of intellectual diversity, and how should Christians regard it? Is it a threat or an asset to the church and its tradition? Drawing on sources across time--from Aristotle to Augustine, Aquinas, and Wittgenstein--this book explores these questions from the perspectives of philosophy and the Christian faith.