There are tools that are available to aid us and guide us in our work. On any given morning, once I did the best I could on my own with a puzzle, I turned to a dictionary and a thesaurus for help. The knowledge of how to use the tools and when to use which tool came with practice. In the same way, we are not expected to do our Teshuvah work on our own without resources. The Machzor we hold in our hands is one such resource.
Breakthroughs come at unexpected times.
Often I would reach an impasse while working on a puzzle. I would have to leave it for awhile- sometimes for an hour, other times for a good part of the day. When I would come back to it with a fresh perspective, an answer would come to me that I had been unable to see previously. Nothing had changed except my ability to perceive something that I couldn't see before. The same is true in our spiritual lives, when we seek to repair our relationships with God and with one another.