Grace

“You're pining," said Jace.
Alec shrugged. "Look who's talking. 'oh I love her. Oh, she's my sister. Oh why, why, why—”
― Cassandra Clare, City of Heavenly Fire

“There is no pretending I love you and I will love you until you die. And if there is life after that, I will love you then.”
― Jace Wayland

“Jace: Herondale, on the other hand, is melodic. Dulcet, one might say. Think of the sound of 'Clary Herondale.'
Clary: Oh, my god, that sounds horrible.
Jace: We all must sacrifice for love.”
― Cassandra Clare, City of Heavenly Fire

“Can I tell you a boring science fact?" she whispered. "I bet you didn't learn it in Shadowhunter history class."
"If you're trying to distract me from talking about my feelings, you're not being very subtle about it." He touched her face. "You know I make speeches. It's okay. You don't have to make them back. Just tell me you love me,"
"I'm not trying to distract you." She held up her hand and wiggles the fingers. "There are a hundred trillion cells in the human body," she said. "And every single one of the cells of my body loves you. We shed cells, and grow new ones, and my new cells love you more than the old ones, which is why I love you more every day than I did before. It's science. And when I die and they burn my body and I become ashes that mix with the air, and part of the ground and the trees and the stars, everyone who breathes air of sees the flowers that grow out of the ground or looks up at the stars will remember you and love you, because I love you that much," She smiled. "How was that for a speech?”
― Cassandra Clare, City of Heavenly Fire