I tried to imagine how things could get much worse. The gods were in the Midwest fighting a huge monster that had almost defeated them once before. Poseidon was under siege and losing a war against the sea Titan Oceanus. Kronos was still out there somewhere. Olympus was virtually undefended. The demigods of Camp Half-Blood were on our own with a spy in our midst. Oh, and according to the ancient prophecy, I was going to die when I turned sixteen—which happened to be in five days, the exact same time Typhon was supposed to hit New York. Almost forgot that.
Rick RiordanWhen Luke had descended into the River Styx, he would've had to focus on something important that would hold him to his mortal life. Otherwise he would've dissolved. I had seen Annabeth, and I had a feeling he had too. He had pictured that scene Hestia showed me—of himself in the good old days with Thalia and Annabeth, when he promised they would be a family. Hurting Annabeth in battle had shocked him into remembering that promise. It had allowed his mortal conscience to take over again, and defeat Kronos. His weak spot—his Achilles heel—had saved us all
Rick RiordanMy point is that love is the most powerful motivator in the world. It spurs mortals to greatness. Their noblest, bravest acts are done for love.
Rick Riordan