From Byron's Don Juan:
Thus lived -- thus died she; never more on her
Shall sorrow light, or shame. She was not made
Through years or moons the inner weight to bear,
Which colder hearts endure till they are laid
By age in earth: her days and pleasures were
Brief, but delightful -- such as had not staid
Long with her destiny; but she sleeps well
By the sea-shore, whereon she loved to dwell.
What is the meaning of the phrase in bold? "Such days, brief but delightful, had not staid long, thanks to her (tragic) destiny"?