A man of reason and vigorous discourse, and a renowned professor of literature and philosophy, C.S. Lewis, always "Jack" to family and friends, never shied from intellectual debate, and through his written works encouraged others to wrestle with the difficult questions of faith. A master of visual illustration and allegory, Lewis wrote with the intuitive understanding that his readers wrestled with the same questions about the Christian story, about pain, suffering, and notions of Heaven and Hell, as he himself had wrestled. He also understood that others found reason and imagination to be incompatible aspects of an understanding of God and the universe.