Memories

What is it that stirs our memories so much that we dream of things that were with different characters? Funny how we can keep things straight when we are awake but in a dream state, everything gets fuzzy and the two worlds seem to blend into one. It is good that our minds tend to forget things in the past and we move on. In dreams, the emotions can come back full force or you can be detached from them. I wonder if it is a choice or just our state of mind at the time of the dream? Do we really forget and move on or do we just stop thinking of the memory? Lots of questions and no answers today.