In our modern church culture, we tend to separate love and logic. We can indulge in anti-intellectual sentimentalism, or cold, self-righteous argumentation. Medieval faith robustly unites affective devotion, or religion of the heart, and theologically-informed inquiry.

Dr. Armstrong directs Opus: The Art of Work at Wheaton College, where he also serves on the biblical and theological studies faculty. He holds a doctorate in church history and taught for ten years in higher education....