The Past: Present, regretful, and shaping

Throughout Faulkner's Sound and the Fury, the reader is constantly being reminded and taken back into the Compson family's past through the three main pasts the story is told through. Each of these characters views the past, and different people, differently and have different attitudes towards events.
In Benjy's chapter, the past is the present. Everything Benjy does, sees, or feels leads him to the past, so he has no clear definition of what is and what isn't at that moment in time. He goes to the past because it is a time of safety and a time where he felt loved because of Caddy. He hides himself in the past to escape the present and the absence of Caddy.
Quentin, whose chapter takes place in the present characters' pasts as well, seems to view the past with regret. He looks at the past and sees how he couldn't help the fall of Caddy, and how, when he tried to, his efforts went for naught, and were brushed over like every other opinion or act of his. He cannot let go of the past because he is being reminded of it and time throughout his everyday life, and therefore commits suicide. The final suicidal act of Quentin's turns out to be much the same as any other act of his, purposeless.
Jason has, by far, the most sour attitude of the past. He blames all of his short comings, faults, and lack of achievements on the past and therefore everyone else. He is reminded of the past in negative ways and, therefore, only has negative views or feelings towards the past, present, and everyone involved in either.
Though each man's attitude towards the past is slightly different, each one shows how the past has undeniably shaped their present and continues to shape their futures, and how one person, Caddy, has been the unwitting orchestrator of them all.