That was a nation who has passed away. Quran 2: 134
Former days are gone and done with, and you benefit nothing by carrying out an autopsy over them, by turning back the wheels of history. The person who lives in the past is like someone who tries to saw sawdust. Of old, they used to say:
Do not remove the dead from their graves.
Our tragedy is that we are incapable of dealing with the present: neglecting our beautiful castles, we wail over dilapidated buildings. If every man and every jinn were to try jointly to bring back the past, they would most certainly fail. Everything on earth marches forward, preparing for a new season – and so should you.
Taken from ‘Don’t be Sad’ by Shaikh Aidh al Qarni