The speaker (whom we know from the title to be Demeter) tells Hades that she wants him to have one thing: knowledge. The knowledge she wishes for him involves learning that acting on desires can have consequences, and that he has to consider these consequences since he is a god and therefore in power over a lot of people. She also lets him know that she can see the repercussions of what he has done already, and how it has hurt the world. She ends the prayer without giving a curse. Instead she says that the biggest curse is having to face up to what you've done, whether you are god or mortal.