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از دی که گذشت هیچ از او یاد مکن
فردا که نیامده است فریاد مکن
بر نامده و گذشته بنیاد مکن
حالی خوش باش و عمر بر یاد مکن
The yesterday that's gone
you must forget what it was;
for the tomorrow not come
don't flitter and fuss.
In the not-come and gone
make not your cause;
be happy just now
don't shift with the breeze
Omar Khayyam