Mundanes who involve themselves in things they know nothing about are likely to meet unpleasant endings.

That was what humans did: They left on another messages through time, pressed between pages or carved into rock. Like reaching out a hand through time, and trusting in a phantom hoped-for hand to catch yours. Humans did not last forever. They could only hope what they made would endure.

The missing stairs baffled Clary. What did vampires have against stairs? -Clary, pg.266-

I've got the Mark of Cain," said Simon. "That means nothing can kill me, right?" "You can kill yourself," Magnus said, somewhat unhelpfully. "As far as I know, inanimate objects can accidentally kill you. So if you were planning on teaching yourself the lambada on a greased platform over a pit full of knives, I wouldn't." "There goes my Saturday.

Now before we do any digging around in that blond head of yours to find out the truth, I suggest you cool your temper. And I know just where you can do that best.” Jace blinked. “Are you sending me to my room?

Truth is brighter than Light Falsehood darker than night Revenge is keener than Axe and Love is softer than melting wax

It's nearly full dark. We should go." "We? I thought you were going to leave me alone." "I lied," Jace said without a shred of embarrassment.