Hatred
"I hate you. I just want to chop you up with your own butcher knife, cook you in garlic sauce, and feed you to Luffy." The green haired swordsman breathed heavily.
"You want to here a story before you brutally murder me" The blonde cook calmy asked after blowing a cloud of smoke.
"No. And I still hate you. And I still want to kill you." Zoro stared darkly at Sanji.
"Once there was a girl. She hated her father. She hated her mother. She hated her friends. Hell, she hated the whole world. One day she meet a boy. The girl who hated the world fell in love with that boy. Before she knew it her love for the boy was even greater than her hate for the world. Finallly the girl admitted her undying love for the boy but the boy didn't feel the same way about the girl. So the girl's heart broke into a million pieces and she died of a broken heart." Sanji finished his story and took another puff of his cigarette.
"What the hell was the point of your stupid story" Zoro seemed to get angrier if that was even possible.
Sanji gave the swordsmans a sly smile. "The more you hate, the more you love."
Moral: The more you hate, the more you love.