There might not be so much of a difference between the side of Light and the side of Dark as you suppose. After all, without the Dark, there is nothing for the light to burn away.
Cassandra ClareYou're a disaster for us, Clary! You're a mundane, you'll always be one, you'll never be a Shadowhunter! You don't know how to think like we do, think about what's best for everyone-- all you think about is yourself! But there's a war now, or there will be, and I don't have time or the inclination to follow around after you, trying to make sure you don't get us killed! Go home, Clary. Go home!
Cassandra ClareHow can you tell? That I like books, I mean. The look on your face when you walked in, somehow I doubted you were that impressed by me.
Cassandra Clare