Percy (to Annabeth): If I was going to pick one person in the world to reattach my head, I'd pick you.
Silena: Awww . . . Percy, that is so sweet!
Annabeth: Shut up, Silena.

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.

I’m sorry I can’t do more. But happy birthday, Sadie.”
He leaned forward and kissed me on the lips.

We had enough quite enough snobbery in this world without exporting it to the hereafter.

A faint smile played on his lips. "Obedience does not come naturally to you, does it"
"No...sir"
"I must take some blame for that, I suppose. The sea does not like to be restrained.

We must embrace our past, no matter how bitter and dark.