The problem with thinking about the past is that it takes time and energy away from the present. Feeling nostalgic is always good, and thinking about fun memories is worth the expense – but it’s always worth thinking about the toll associated with the past before being consumed by it.
Reliving positive memories brings joy, but reliving negative ones does nothing but bring anxiety and anguish. The older the memory, the more irrelevant this anguish is today.
Every second spent thinking about the past is a second lost from the present, and a second lost from planning for the future.
Pick what you recall from the past wisely, lest you forget the present.