“The two of them resembled the honeysuckle which clings to the hazel branch: when it has wound itself round and attached itself to the hazel, the two can survive together: but if anyone should then attempt to separate them, the hazel quickly dies, as does the honeysuckle. "Sweet love, so it is with us: without me you cannot survive, nor I without you."”

“Leo,” Hazel gasped, “I can’t—my arms—”
“Hazel,” he said. “Do you trust me?”
“No!”
“Me neither,” Leo admitted.”

“Hazel blinked. “Two gods had a horse for a kid?”
“Long story.”

“We still should have enough time to reach Rome.”
Hazel scowled. “When you say…”
Leo shrugged. “How do you feel about?”
Hazel put her face in her hands for a count of three. “Sounds about typical for us.”

“You speak horse?" Hazel asked.
"Speaking to horses is a Poseidon thing," Percy said. "Uh, I mean a Neptune thing."
"Then you and Arion should get along fine," Hazel said. "He's a son of Neptune too."
Percy turned pale. "Excuse me?”

“A thing can be true and still be desperate folly, Hazel.”

“I sell dreams, small comforts, sweet harmless temptations to bring down a multitude of saints crashing among the hazels and nougatines”

“Love and compassion are necessities, not luxuries. Without them humanity cannot survive.”

“I'm gonna be percy Jackson when I grow up," she told Hazel solemnly.
Hazel Smiled and ruffled her hair. "That's a good thing to be, Julia."
"Although," Frank said. "Frank Zhang would be good too.”

“I will bring you flowers from the mountains, bluebells,
dark hazels, and rustic baskets of kisses.
I want to do with you
what spring does with the cherry trees.”