Need help with what this means?

Question

its for the story Oedipus Rex
Let every man in mankind's frarity consider his last day, and let none presume on his good fortune until he find life,at his death, a memory without pain
i need to write an essay tomorrow telling wut it means and would really appreciate if u people could help me

Answer 1

The interpretation that I can come up with is:
While you are busy living your life, be cognizant of what you are doing. You don't want your life's "review" filled with memories that you regret. You want to be able to look back on your life with pride & satisfaction that you truly lived a good life & your "memories will be without pain."
Hope this helps.
Phyllis G.