He decided he wanted to hold God accountable for the evils in the world. The book follows a bizarre series of events in the lives of him and his painter friends and effectively documents his descent into paranoid delusions as he becomes more and more unreliable as a narrator leaving the reader to become more and more unsure about what exactly is happening in Boston.
The protagonist decided to hold God responsible for the world's evil, and the story follows a series of strange occurrences in his life with friends, documenting his downward spiral into paranoid fantasies that make him an untrustworthy narrator, causing the reader to doubt what is actually happening in Boston.