Don't be too hasty," she warned. "Conserve your strength. If you're too eager to fight the undead, you may find yourselves joining them. Then you'd never see us again, and we'd be very sad." "Yes," said Christian. "I'd cry into my pillow every night." I resisted the urge to kick him. "Well, I couldn't visit if I was Strigoi, yeah, but hopefully I'd just die a normal death. Then I could come see you as a ghost.
Richelle Mead (2008). “Shadow Kiss: A Vampire Academy Novel”, p.156, Penguin