What metaphors are used in Avalon by Anya Seton?

Thev dream is a metaphor for inner longing and fate. A dream or vision that Rumon had as a fifteen-year-old child, soon after the death of Vincent, the harpist. A thing of great beauty, this vision was of an island suffused with a golden light that floated somewhere in the west. A ruby red cup, transparent and shimmering is beneath the wings of a white dove. Beams of light shoot down and touch Rumon's face gently. There is music in the air and a voice that urges Rumon on a holy quest of brotherhood for all men, and peace. The voice speaks of love and induces awe, joy, and a sense of dedication in Rumon.