[Sjk4]

I have just finished participating in this musical and I had one quote that fascinated me but couldn't completely wrap my mind around it the play is about a princess who gets captured by a Egyptian captain and they accidentally fall on love he is destined to become king of Egypt and wishes he could find a way to be free they both fall in love and get captured and die in a toumb together and in the end they find each other in present day in a new life. And this is the quote that confused me:
Every story, new or ancient
Bagatelle or work of art
All are tales of human failing
All are tales of love at heart

I know this quote is talking about how every story has to do with love but I'm confused what they mean by human failing? If anyone has an idea let me know thanks

[Sjk4]

This is the whole song if that helps

Every Story Is A Love Story by
Amneris:
Every story, tale or memoir
Every saga or romance
Whether true or fabricated
Whether planned or happenstance

Whether sweeping through the ages
Casting centuries aside
Or a hurried brief recital
Just a thirty-minute ride

Whether bright or melancholy
Rough and ready, finely spun
Whether with a thousand players
Or a lonely cast of one

Every story, new or ancient
Bagatelle or work of art
All are tales of human failing
All are tales of love at heart

This is the story