Harry Potter and the Goblet of Fire - Chapter Thirty-Seven: The Beginning
“It is my belief — and never have I so hoped that I am mistaken — that we are all facing dark and difficult times. Some of you in this Hall have already suffered directly at the hands of Lord Voldemort. Many of your families have been torn asunder. A week ago, a student was taken from our midst.
“Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.”