"As his raft skimmed over the water, taking him back to the mortal world, he understood a line from the Prophecy better-an oath to keep with a final breath.He understood how dangerous oaths could be. But Leo didn't care."I'm coming back for you, Calypso,"he said to the night wind. "I swear it on the River Styx."
"Almost everything strange washes up near Miami."
"Nothing lasts forever. But the thing is, you can reuse some. Use your mind. - Leo's Mother, The Lost Hero"
"Tyson- "Cash? Like...green paper?"Percy- "Yeah."Tyson- "Like the kind in duffel bags?"Percy-"Yeah, but we lost those bags days a-g-g--.""Tyson! How did you--"Tyson- "Thought it was a feed bag for Rainbow. Found it floating in sea, but only paper inside. Sorry."
"Sometimes small things can become very large, indeed."
"Poison!"Grover yelped. "Don't let those things touch you or...""Or we'll die?"I guessed."Well...after you shrivel slowly to dust, yes.""Let's avoid the swords,"I decided."