“Raphael snapped, "This isn't funny."
"That's why no one's laughing." Jace stood, hauling Raphael upright, jamming the tip of his knife between Raphael's shoulder blades.”

“No matter how subtle the wizard, a knife between the shoulder blades will seriously cramp his style.”

“I went to see this picture [Raphael's painting 'Madonna della Sedia' which Renoir saw in Florence in 1882] just to have a good laugh – and I found myself in front of the most wonderfully free, solid, simple, alive painting it is possible to imagine – arms and legs of real flesh, and what a touching expression of maternal tenderness.”

“Death isn't funny. Then why are there so many jokes about death? Jill, with us — us humans — death is so sad that we must laugh at it.”

“Why are you such an asshat?"
"An asshat?" Jace looked as if he were about to laugh.”

“But, Polly, a principle that can't bear being laughed at, frowned on, and cold-shouldered, isn't worthy of the name.”

“Where does the hand become the wrist?
where does the neck become the shoulder? The watershed
and then the weight, whatever turns up and tips us over that
razor's edge
between something and nothing, between
one and the other.”

“Nothing thicker than a knife's blade separates happiness from melancholy.”

“Alec shrugged "Look who's talking. 'Oh, I love her. Oh, she's my sister. Oh why, why, why--"
Jace threw a handful of dead leaves at Alec, making him splutter.
Isabelle was laughing. "You know he's right, Jace.”

“A mind all logic is like a knife all blade. It makes the hand bleed that uses it.”