Cassandra Clare

Witches and warlocks can only use magic because they have demon blood.”

“I use tools that are magical. And just to be able to do that, I have to undergo rigorous training. The rune tattoos on my skin protect me too. If you tried to use one of the seraph blades, for instance, it’d probably burn your skin, maybe kill you.”

If you were half as funny as you thought you were, my boy, you’d be twice as funny as you are.”