The Reverend Ralph Harper, a philosopher and theologian, has been credited with introducing existentialism to North America in 1948 with his work Existentialism: A Theory of Man. Forty years later, Harper delved deeper into the interior life of the human imagination in On Presence: Variations and Reflections. Winner of the 1992 Grawemeyer Award in Religion, On Presence is an insightful articulation of mankind's experience of...