What is there about things seen through a window? The natural frame, perhaps? But then the eye is already past the window and looking for what there is and what might be beyond. Perhaps the window is a threshold. Have you noticed what happens when two people are talking at a bus stop. They don’t know each other, but they strike up a conversation. As often as not, when they get on the bus they will divide and go their separate ways. The threshold must exert some powerful force on us.