Manfred suggests that the rebels will learn that they should not have released Pandora's box with their disloyal ways.
Explanation:
Pandora's Box is a mythological story that shows how all the evil elements on earth came due to Pandora's opening of the box. In this story, Zeus gifts Pandora a box and requests her never to open it. Out of curiosity, Pandora opens the box and unleashes all the evil elements such as hate, disease, misery, poverty, envy and many more.
In this play, Manfred suggests that the rebels will learn that they should not have taken the step of confronting in the battle.
