Jace Herondale: I may not believe in sin, but I do feel guilt. We Shadowhunters live by a code, and that code isn’t flexible. Honor, fault, penance, those are real to us, and they have nothing to do with religion and everything to do with who we are. This is who I am, Clary. I am one of the Clave. It’s in my blood and bones.

From the book The Mortal Instruments: City of Bones (Book One) | Written by Cassandra Clare