But what does it mean to let go?
First we must ask what is "there" to let go of. The past is made up of thoughts, feelings, embodied patterns, beliefs, moods, memories, and habits. Together they comprise the "story" that we're attached to and is, in most cases, bigger than we are. It is probably not an accident that we call the past history -- HIS STORY. So to let go of the past we must be willing to let go of our story -- the nonstop narrative about the "way it is," "what it means" and "why everything is the way it is."
But letting go of our story isn't so easy.
The reason letting go can be difficult is that we actually believe that our story is true in the sense that it accurately describes what happened or what caused the present to be the way it is. If someone or something challenges our interpretation, then we believe just as fiercely that it must be false and therefore will usually argue vigorously for our point of view. What is not so evident is that while we can acknowledge poor memory or critique our analysis of why something happened or what it means, we rarely question our mega-belief that the past is the cause of the present and therefore the future. This belief then becomes the basis or our practices of forecasting or predicting what will happen in the future and then organizing our actions and commitments around what we predict will happen.
For example, when planning budgets in most organizations, the starting point is to project a trend to determine what we expect will happen in a year and then, based on that forecast, plans are made and resources allocated to achieve a goal given that forecast. The results will inevitably validate the planners' assumptions or, when they are not forthcoming, a plausible explanation of causality anchored in the past is required to keep the process going.
The result of this belief and associated practices is that we are continually living "into the past" that we project as a prediction that in turn makes it virtually impossible to ever really let go of the past. This structure of thinking is tantamount to trying to get out of our own skin.
As we get older, we need to appreciate that the more we let go, the more time and experience we have left. I think that the key to aging well and just about everything else in life is the ability to "be present," to be fully "in the moment." When we're attached to our stories or the past, we are not present, and time is always proportional to the past and how long we've lived. That is why a year can be forever for a child and is the blink of an eye for someone who is very old. When we are living in present time, then our experience is not related to anything else and is for all practical purposes "timeless." As the old proverb goes, we can live one experience 10,000 times, or we can have 10,000 experiences. The key is learning to "let go" so that each day is a "new beginning."