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.