The two are now bound inextricably. Should one die, the other will follow. No wepon in this world can wound only one of them
Cassandra ClareThat 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.
Cassandra ClareSuch a fuss ofer a few mundanes." Mrs Dark chuckled and moved to stand beside her sister, so that Will, with his blazing sword, was between Tessa and both ladies. "We have no quarrel with you, Shadowhunter, unless you choose to pick one. You have invaded our territory and broken the Covenant Law in doing so. We could report you to the Clave-" "While the Clave disapproves of trespassers, oddly, they take an even darker view of beheading and skinning people. They're peculiar that way," Will said
Cassandra Clare