“It smells like heartbreak in here,” said Jace.”

“She gritted her teeth. She was here with Sebastian, on her way to see a powerful warlock, and mentally she was maundering on about the way Jace smelled.”

“And quit baring your fangs at me. It's making me nervous."

"Good," Simon said. "if you want to know why, it's because you smell like blood."
"It's my cologne. Eau de Recent Injury." Jace raised his left hand.”

“Before Clary could respond, Jace’s eyes slid open. He looked up at the warlock, dazzled and dizzy. “What are you doing here?”
Magnus grinned down at Jace, and his teeth sparkled like sharpened diamonds.
“Hey roommate,” he said.
-pg. 128-”

“I'm not so sure about this wind and howling darkness business," Jace went on, "smells more like landfill to me. You sure you're not from Staten Island?”

“I need Jace,” said Sebastian. “But in his heart, he’s not like me. Butare.”

“I'm not sure you're quite sensible of the honor I'm doing you," Jace said. "you'll be the first mundane who has ever been inside the Institute.""Probably the smell keeps the rest of them away.”

“He has many things I haven’t got,” said Jace. “Like nearsightedness, bad posture, and an appalling lack of coordination.”
-Jace about Simon, pg. 331-”

“He said to me, "It will always be difficult, but if you cry like this every time, you will die of heartbreak. Just know it is enough sometimes to know it is difficult."”

“We tiptoed around each other like heartbreaking new friends.”