How Do You Work With a Theme in Your Writing?

"I like to have a theme in mind, although I will say that in the actual writing, sometimes you can discover another theme that might even be better," she said. "This movie felt like it was working from the time of the development when people would give notes." The film is about two women who become mother and daughter but don't know they are one person at first. It's set 70 years before Gesso (played by Viola Davis) became king.