a man takes his sadness down to the river and throws it in the river but then he's still left with the river. A man takes his sadness and throws it away but then he's still left with his hands.
Castiel looks at the knife indifferently, maintaining his composure of superiority. He wasn’t expecting any less, just like with his brother Dean, but this was important.
”You’ll come to realise that you’ll have to trust me, Sam.”
he doesn’t seem a f r a i d , but perhaps he doesn’t know what the knife is. after all, it’s not as if every demon has the intel. and maybe this thing isn’t a demon. whatever. the knife works on anything, so sam has no cause to be nervous.