How does Stephen King use imagery in Different Seasons?

Imagery:

"So there was a need for Andy's services. They took him out of the laundry and installed him in the library, but if you wanted to look at it another way, they never took him out of the laundry at all. They just set him to work washing dirty money instead of dirty sheets."

"Some birds are not meant to be caged, that's all. Their feathers are too bright, their songs too sweet and wild. So you let them go, or when you open the cage to feed them they somehow fly out past you. And the part of you that knows its wrong to imprison them in the first place rejoices, but still, the place where you live is that much more drab and empty for their departure."