Castiel (to Cosmic Entity): You can prance and you can preen and you can scream and yell and remind me of my failings but somehow, I’m awake. And I will stay awake and I will keep you awake until we both go insane. I will fight you. Fight you and fight you forever. For eternity. Release me.

From Supernatural – Season 13 Episode 4: ‘The Big Empty’ (13×04)