The wasteland of human spirit lacks the water of life and the belief of soul, and human beings can only seek the spirit of wisdom and love in ancient myths and civilizations. Inspired by anthropologist Weston's From Sacrifice to Legend and Fraser's The Golden Branch, Eliot used the mythical structure of King Arthur's search for the Holy Grail. Symbolism makes poetry philosophical and reveals the themes of death, rebirth and redemption. Many symbols in poetry have multiple meanings. For example, water is the source of life and death; Fire can be the fire of desire, or it can burn out lust and make people reborn.