The Quest of the Holy Grail adds a spiritual dimension to the adventures of Arthur's knights. Galahad replaces Lancelot as the central figure, though he appears and disappears so often that many of the knights are engaged in a quest to find him rather than the Grail. The central concept of the Grail was never accepted by the Church, and the Quest remains a secular romance which can be interpreted as a spiritual allegory. This is done by the hermits...