It seems to be a general human sentiment, this longing for things past. It should not really surprise us. Changes that cannot be altered, consequences of decisions, chances missed, opportunities not taken, tasks forsaken. In hindsight, things usually were better or easier then than they are now.
However .... the past is gone forever and you can only remember it. You can relive it (in your mind, not in your body) but you can NOT change it.
Melancholia and nostalgia take many shapes. Music and photography are well-established media to explore and express melancholia and nostalgia.
(foto Agnieszka Abramowicz)
.... time passes by
like a rose dying on the vine
with a soft sigh