After failing to procure a handful of mustard seeds from a house where death had never knocked at the door, she sat down by the roadside feeling helpless. She saw the lights of the city that flickered and were extinguished. At last, it was darkness everywhere.
She realised that death was common to all and she was being selfish in her grief. Yes, this is what Buddha wanted her to understand, that, everyone who is born has to die one day.