Ever hear of individuals who relive the past by going through their memories for the millionth time? Ever encounter individuals that seemed so carefree of what happened in the past? 

How do they do that?

I once heard that wishing to go back to the past can create a rather negative view on the present. I also once heard that it would be a good idea to acknowledge the past and to remember it only to learn from it. 

Some people live in the past because they remember all of the good times they had back then in comparison to today. Some people live in the present as if to forget everything else. 

To live in the present is a necessity, but to tune everything else out is not. The past is a story of which tells listeners and/or readers events that had already occurred.  We have the potential to learn from those stories, all it takes is an attentive ear.