The sad fact is that we are powerless in a way. I emphasis "in a way". Sometimes life comes at us lie a tsunami. The past cannot be changed. What happened happened. The question is how to move forward. The problem is the hurt in the past colors our vision of the future. So what do you do?
I believe that it is different for everyone.
But there are some core elements that are the same.
Finding faith is one of them. Or regaining it, because as children we had faith that all was fine and would be fine.