Discovering the art of Eddie Lee Kendrick was, as Ruth Kaplan recalls, "like walking into another world." In 1977, Kaplan, an administrator at an elementary school in Little Rock, Arkansas, walked into the school janitor's supply closet and found its walls hung with bright, lively paintings and drawings of Jesus, of angels, and of people in prayer and ecstasy, all created on corrugated cardboard. It was a world lit by the spiritually-infused...