I ran into this: "And you, Madame Lucrezia, flower of the Borgias, if a poet painted you as the catholic Messalina, a skeptical Gregorovious turned up and almost completely absolved you of that quality; so that, if you have not become exactly a lily, at least you have emerged from the mire."
I would like to know if there is a metaphor of lily in this text. if so, what does it mean? more over, what does "emerging from the mire" mean? I understand from the text that Gregorovious absolved her from the reputation for promiscuity.