Why is it that moments of happiness are so hard to relive, and happy memories so ephemeral, while sorrow catches you by the scruff of your neck and subjects you to the churning mournful discomfort all over again, practically every time?

Wouldn’t it make more sense to be able to relive the happiness with the same intensity of feeling? Or would that just make us more lazy, more content with old memories than making new ones? Would that not be conducive to the survival of the species in some way?

Or perhaps, more simply, is it just me? 🙂