I thought this write was mostly going over deep thought, trying to accept and make sense of things that have happened in the past, something alot of people can relate to. And perhaps, you feel that as each day comes you're more and more accepting of things, perhaps things you would rather not be accepting of.
The last part kinda gets me. To make a day of just thinking about the past would be a waste of a day. But, if it was predestined to be that way, then it was a good use?