Let every man in mankind’s frailty
Consider his last day; and let none
Presume on his good fortune until he find
Life, at his death, a memory without pain.

Sophocles (496-406 BC) Greek tragic playwright

Oedipus Rex, l. 1529 (concluding words)

Young translation:
And of no moral say
"That man is happy," till
Vexed by no grievous ill
He pass Life's goal.