What place, if any, does the imagination have in the practice of prayer? The fourth-century theologian Evagrius of Pontus’s Chapters on Prayer addresses the importance of “imageless prayer” in two places. “When you pray” cautions Evagrius, “do not form images of the divine within yourself, nor allow your mind to be impressed with any form, but approach the Immaterial immaterially and you will come to understanding” (ch. 66).