Acceptance

Maybe this is something that happens in old age?  

In our youth and adult life we (hopefully) have had some happy memories. We seem to chase these forever, trying to recreate them.

As we get older we have to accept them for what they were: good memories, that cannot be recreated.  We must waste valuable energy trying to chase these, when in reality we have to accept that we had these and be thankful.

See https://poets.org/poem/shropshire-lad-xl

Someone wrote that we grow old too soon and wise too late!