Saint Satan:
While it is true that we cannot change the past, we certainly can change the way we view the past. The most important thing to do with the past is to let it go. As "A Course in Miracles" put it; "The one thing certain about the past is that IT IS PAST!"
Re: Accepting Responsibility: From ACIM, p.448, Edition 2.
"I am responsible for what I see.
I choose the feelings I experience, and I decide
upon the goal I would achieve.
And everything that seems to happen to me
I ask for, and receive as I have asked.
Re: Your question of a spiritual nature.
From the ACIM section called Clarification of Terms (Epilougue) we have:
"Be not afraid. We only start again an ancient journey long ago begun that but seems new. We have begun again upon a road we travelled on before and lost our way a little while. And now we try again. Our new beginning has the certainty the journey lacked till now. Look up and see His Word among the stars, where He has set your Name along with His. Look up and find your certain destiny the world would hide but God would have you see."
I can tell from your previous posts, which I have found to be quite helpful, that you are well along the path.