She could ask for anything, she thought dizzily, anything--an end to pain or world hunger or disease, or for peace on earth. But then again, perhaps these things weren't in the power of angels to grant, or they would already have been granted. And perhaps people were supposed to find these things for themselves.
Cassandra Clare (2011). “Cassandra Clare: The Mortal Instrument Series (4 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels”, p.1245, Simon and Schuster