The central idea of the story follows the decline of the Compson family. Much of their decline is due to instability, much like how Benjy freaks out if they take a different route to church one that he is not used to (stable with), each character freaks out when their idea of stability (whether that be Caddy's purity or holding up the ideal southern values) each character slowly loses it. Caddy runs away, their mom becomes ill-er, Jason be becomes obsessed with female Quentin (Caddy's daughter), and (brother) Quentin commits suicide. What helps portray their levels of decline is the way Faulkner chose to write each section. Quentin's in the most fragmented and discombobulating, which reflects his mental state. Only Disley's section is in the third person which is something to note. Her's is the least confusing section (Jason's is also pretty linear), possibly because she isn't blood related but she is included because she has been part of the family for so long. Each section also jumps between moments of time which has a disorienting effect on the reader.