“The pilgrimage idea, the outgoing quest, appears in mystical literature under two rather different aspects. One is the search for ‘the Hidden Treasure which desires to be found.’ Such is the ‘quest of the Grail’ when regarded in its mystic aspect as an allegory of the adventure of the soul. The other is the long, hard journey towards a known and definite goal or state. Such is Dante’s ‘Divine Comedy’; which is, in one of its aspects, a faithful and detailed description of the Mystic Way.” (Evelyn Underhill, Mysticism. New York: E.P. Dutton, 1912, p. 154)