"—this angel of freedom: what do you think he's made of? Of God's
condescension and charity? Of his love? His justice? No, this angel
is made of the patience, obstinacy and struggle of mankind!”
-The Last Temptation of Christ by Nikos Kazantzakis
Eric Kripke on the angel storyline
x The reason that Angels are such a big deal on the show is because of Misha.
Had someone else come in as Cas and stiffed it we would have only done a one year angel storyline and then we would have moved on to something else.
He was so endlessly interesting and then you started fleshing out his world and because Misha was so compelling it evolved.