All knowledge hurts.

You couldnt erase everything that caused you pain with recollection.Every memory was valuable; even the bad ones

To destroy the enemy it can be necessary to understand him.

(Jace) "Is there anything special you want to see? Paris? Budapest? The Leaning Tower of Pisa?" Only if it falls on Sebastian's head, she thought.

It would hardly benefit me to hold anything back unnecessarily, when I know what I'm asking. For you to find a needle in--God, not even a haystack. A needle in a tower full of other needles.

Everyone knows that quote because of the Doors." Jace looked at her blankly. "The Doors. They were a band." "If you say so," he said. "I suppose you don't have much time for enjoying music," Clary said, thinking of Simon, for whom music was his entire life, "in your line of work." He shrugged. "Maybe the occasional wailing chorus of the damned.

Temper us in fire, and we grow stronger. When we suffer, we survive.