Rowan Williams applies his knowledge and imagination in reflecting on four classic Eastern Orthodox icons of Christ: the Transfiguration, the Resurrection, the Hospitality of Abraham (an icon which depicts the Trinity) and the Pantocrator, or Christ in glory. Icons have been called "theology in line and colour" and in these images we find eternal truths and life-changing challenges. Icons have become increasingly popular as aids to devotion, but with an expert guide such as Rowan Williams, their many layers of meaning emerge more clearly.