From "The Open Window"

Such doors.

             The window falls
below the knee and rises higher than the raised hand.

Wittgenstein, determined to find
the window's perfect proportion, decided on ten to one,
height to width

but like a coastline,
a window is infinite, its perimeter
increasing forever without ever surpassing its frame

has everything to do with sight as exceeding. For centuries
they thought light

was something that flew out from the eye, the reaching child

                     for centuries thought light

had everything to do
with a windowsill on which sits a shell.

-- Cole Swensen