Clarity is shown in this last chapter as two things are suggested for the Compson family's future. The first is that although the story ends with the completion of the families downfall, the simple fact that it takes place on Easter Sunday signifies hope, and secondly redemption. Faulkner leaves us with the idea that though the family has nearly hit rock bottom, their future remains bright.
Overall, I think Faulkner put the chapters in this order to show us as the reader that people have different interpretations of the same events. One of the largest details I realized when reading The Sound and The Fury was that personality and mental state had the largest role in telling sequential events. If Jason wasn't as vulgar, his interpretations of others would've been drastically altered. Where as also Benjy's mental state had an enormous role toward his interpretation of events. Personally, I believe Faulkner's tale told 4 times signifies that writing is always told in a bias. Though Faulkner told many stories about the Old South vs. New South etc. the main idea throughout the story is the unique storytelling which is emphasized throughout the entire book.
