This Companion introduces readers to the practice of Christian theology, covering what theologians do, why they do it, and what steps readers can take in order to become theological practitioners themselves. The volume aims to capture the variety of practices involved in doing theology, highlighting the virtues that guide them and the responsibilities that shape them. It also shows that the description of these practices, virtues and responsibilities is itself theological: what Christian theologians do is shaped by the wider practices and beliefs of Christianity. Written by a team of leading theologians, the Companion provides a unique resource for students and scholars of theology alike.