The Nephilim - the bogeyman for monsters, and all those who could be monsters.

Jessamine flushed. "Ugh! Charlotte, Will's being vexing." "And the sun has come up in the east," said Jem to no one in particular. ... "And the sun comes up in the WEST," said Will, who had apparently heard Jem's earlier comment.

Coaxing drunken Shadowhunters into making fools of themselves was a favorite occupation among the Downworlders, and this performance had been a tremendous success.

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." - Simon, 133

You would make a very ugly woman" "I would not. I would be stunning

Jem always said that Will rushed toward the end of a mission rather than proceeding in a measured manner, and that one must look at the next step on the path ahead, rather than the destination in the distance, or one would never reach one’s goal. Will closed his eyes for a moment. He knew that Jem was right, but it was hard to remember, when the goal that he sought was the girl that he loved.

Isabelle looked at him thoughtfully. "Did you seriously jump thirty feet out of a Malachi Configuration? Did he, Alec?" "He did," Alec confirmed. "I've never seen anything like it." "I've never seen anything like this." Jace lifted a ten-inch dagger from the floor. One of Isabelle's pink brassiers was spread on the wickedly sharp tip. Isabelle snached it off, scowling.