“Blood isn't love”

“Ugh," he said after a few swallows. "Dead blood." Jace's eyebrows went up. " Isn't all blood dead?" "The longer the animal whose blood I'm drinking has been dead, the worse the blood tastes," Simon explained. "Fresh is better." "But you've never drunk fresh blood. Have you?" Simon raised his own eyebrows in response. "Well, aside from mine, of course," Jace said. "And I'm sure my blood is fan-tastic.”

“Love isn't a weakness.”

“The blood of Heaven binds you," said the Queen. "Blood calls to blood, under the skin. But love and blood are not the same.""Riddles," Clary said angrily. "Do you even mean anything when you talk like that?""He is bound to you," said the Queen. "But does he love you?”

“Of course he loves me. I’m his sister.”“Blood isn’t love,” said Magnus, and his voice was bitter.”

“But they love each other. Isn't that what love means? That you're supposed to be there for the other person to turn to, no matter what?”

“But they love each other," Clary said, appalled. "Isn't that what love means? That you're supposed to be there for the other person to turn to, no matter what?"Luke looked toward the river, at the dark water moving slowly under the light of the autumn moon. "Sometimes, Clary," he said, "love just isn't enough.”