Describe symbolism in Suttree by Cormac McCarthy

Harrogate's adventure into the underground caves and caverns below the city is symbolic of the search for meaning throughout the story. Harrogate takes the dark side, the metaphorical underbelly, to seek his treasures and, like a lovesick soul, becomes obsessed with what he might find. The reader can assume that this insane, nonsensical project of his symbolizes his desperate need for love, and his apparent conviction that he is not capable of finding it in a conventional way.