- Dean: "She’s just a girl, Cas. She didn’t chose this."
- Castiel: "She’s a time bomb, at best. She has all of the power of heaven’s most powerful weapon locked up inside her. With Lucifer risen, this ‘girl’ grows strong. Soon, she will do more than just make a few beakers boil and smash—something that will draw the demons to her. The demons will find this girl and Lucifer will twist her to his purpose. And then, with a word, she will destroy the Host of Heaven."
- — Dean and Cas arguing about killing Leda.