"We crucify ourselves between two thieves: regret for yesterday and fear of tomorrow."-Fulton Oursler, American journalist and author 1893-1952 wrote this and as you age and have more history behind you then you have ahead of you what he says is right on target.
If we have lived a fairly decent life as most of us have tried to do, what we regret from all our yesterdays is probably pumped up by time and our imaginings. People we have wronged, and we regret doing it, most likely don't remember the incident or us for that matter. If you remember those times as I do, then you and I are putting ourselves through unnecessary turmoil. What say we forgive ourselves. Good! As for the fear of the future, what is it we fear? Is it eternity or the door we have to go through to get there? I don't know either, so I am going to try hard to not dwell on it and enjoy the rest of the journey only using the calender to make notes of appointments and fun things to fill my days.