.. And from within the box rests the final remains. The flower still grows.
It's a metaphor describing the irreversible effects of releasing the full contents of pandora's box; once all the demons were unleashed, all that was left at the bottom was Hope. In the picture, it's the acceptance of a terrible reality -- no turning back, no excuses, no rewriting the script -- and at the same time.. I still saw a reason to smile.
Mofy refers to the Hope as a flower.