He is the Winter Soldier. He is James Buchanan Barnes. He's not one and he's not the other, and he's not sure if that makes him anything worth saving. [Steve/Bucky]
Thorin's madness had been like a dam bursting; fast and brutal and incomprehensible, like water rushing out and devastating everything in its path. For Bilbo, it's more like a slow trickle over the course of a lifetime. Out of sight and out of mind - and almost imperceptible until he's already drowning.