“I've got a few ideas," (Amy) admitted. "But I don't know where we're going in the long term. I mean - have you ever thought about what this ultimate treasure could be?""Something cool." (Dan)"Oh, that's real helpful. I mean, what could make somebody the most powerful Cahill in history? And why thirty-nine clues?"Dan shrugged. "Thirty-nine is a sweet number. It's thirteen times three. It's also the sum of five prime numbers in a row - 3,5,7,11,13. And if you add the first three powers of three, 3 to the first, 3 to the second, and s to the third, you get thirty-nine."Amy stared at him. "How did you know that?""What do you mean? It's obvious.”

“She led the way. Eyeless sockets of the dead seemed to stare at them as they passed. "These are cool," Dan decided. "Maybe I could-""No, Dan," Amy said. "You can't collect human bones.""Awww.”

“We only have a few hours, so listen carefully.If you’re hearing this story, you’re already in danger. Sadie and I might be your only chance.Go to the school. Find the locker. I won’t tell you which school or which locker, because if you’re the right person, you’ll find it. The combination is 13/32/33. By the time you finish listening, you’ll know what those numbers mean. Just remember the story we’re about to tell you isn’t complete yet. How it ends will depend on you.The most important thing: when you open the package and find what’s inside, don’t keep it longer than a week. Sure, it’ll be tempting. I mean, it will grant you almost unlimited power. But if you possess it too long, it will consume you. Learn its secrets quickly and pass it on. Hide it for the next person, the way Sadie and I did for you. Then be prepared for your life to get very interesting.”

“Hubris means deadly pride, Percy. Thinking you can do things better than anyone else... even the gods.''You feel that way?'She [Annabeth] looked down. 'Don't you ever feel like, what if the world really is messed up? What if we could do it all over again from scratch? No more war. Nobody homeless. No more summer reading homework.''I'm listening.''I mean, the West represents a lot of the best things mankind ever did - that's why the fire is still burning. That's why Olympus is still around. But sometimes you just see the bad stuff, you know? And you start thinking the way Luke does: "If I could tear this all down, I would do it better." Don't you ever feel that way? Like you could do a better job if you ran the world?”

“Eat bitter, taste sweet," Frank said. "I hate that proverb.""But it's true. What do they call it these days---no pain, no gain? Same concept. You do the easy thing, the appealing thing, the peaceful thing, mostly it turns out sour in the end. But if you take the hard path---ah, that's how you reap the sweet rewards. Duty. Sacrifice. They mean something.”

“Don't you ever feel like, what if the world really IS messed up? What if we COULD Do it all over again from scratch? No more war. Nobody homeless. No more summer reading homework.'m listening. Annabeth: I mean, the West represents a lot of the best things mankind ever did--that's why the fire is still burning. That's why OlympusIs still around. But sometimes you just see the bad stuff, you know? And you start thinking the way Luke does: 'If I could tear this all down, i would do it better.'. Don't you ever feel that way? Like YOU could do a better job I'd you ran the world?Percy:Um...no. Me running the world would be kind of a nightmare. Annabeth: then you're lucky. Hubris isn't your fatal flaw.Percy: what is?Annabeth: I don't know, Percy, but every hero has one. If you don't find it and learn to control it...well, they don't call it 'fatal' for nothing. Percy(thinking to himself): I thought about that. It didn't exactly cheer me up.”

“Aphrodite: Pfft. That's not the point. Follow your heart.Percy: But... I don't know where it's going. My heart, I mean.”