It's pouring, rain drumming on the roof, and Sam burrows deeper into worn blankets. He's usually up by now- workout done, breakfast eaten and back on the road, but today he can't summon the energy. Maybe he's getting used to being alone, but he can't imagine ever becoming accustomed to facing a gray, dismal day without the light that had been a part of his life since always.
There's a darkness where Dean used to be and Sam's using it. He's okay with the fact that Dean wouldn't recognize the man he's become. The Trickster will recognize him- that's enough.