Elite 2 - Angels of the higher orders cannot be summoned by even the most powerful sorcerers. More often than not, the sorcerer will accidentally summon one of the Fallen. In this case, if ANY part of the ceremony fails, the results can be catastrophic.
What if Katniss didn't voulunteer? What if Tris didn't jump? What if Harry didn't survive? What if Hazel didn't love? What if Percy didn't fight? What if Thomas didn't run? WHAT IF I DIDN'T OPEN THAT BOOK?<< that is so beautiful and also made me sad