Only the fire of life can melt the chains of death.

Maybe if he did really well they'd give him some mouldy apples.

Is a knife evil? Only if the wielder is evil.

Now, as far as I knew, he (Luke) was still sailing around on his demon-infested cruise ship while the chopped-up Lord Kronos re-formed, bit by bit, in a golden sarcophagus, biding his time until he had enough power to challenge the Olympian gods. In demigod-speak, we call this a “problem.” - Percy, 'The Battle of the Labyrinth

Armed with my sword and wand, I was all set for a stroll through the swamp to look for a hungry monster. Oh, joy!

"Something was wrong with Luke," Annabeth muttered, poking at the fire with her knife. "Did you notice the way he was acting?" "He looked pretty pleased to me," I said. "Like he'd spent a nice day torturing heroes." "That's not true! There was something wrong with him. He looked... nervous. He told his monsters to spare me. He wanted to tell me something." "Probably, 'Hi, Annabeth! Sit here with me and watch while I tear your friends apart. It'll be fun!"

Hazel frowned. "Why that one?" "You don't see the ghost?" Frank asked. "Ghost?" Nico asked. Okay... if Frank was seeing a ghost that the Underworld kids couldn't see, something was definitely wrong.