A few weeks ago I met our daughter Sarah in Philadelphia. We had an afternoon to wander around a foggy city. We were both fascinated by the way huge buildings hid their tops in the cloud, like a 3-year-old playing hide-and-seek with her legs in plain sight.
Philadelphia is a small city, but I don't spend much time in cities, and I was amazed by all the reflecting surfaces and contrasting shapes.
The fog seemed to press the contrasting angles closer together;
With such a plethora of constructed angles and surfaces, the occasional natural elements took us completely by surprise.
That evening, as I stood waiting for my train, the track disappeared into night just as the skyscrapers had disappeared into the foggy day.
The song (musical, movie) suggest that "On a clear day you can see forever." But it seems to me that sometimes we get more of a glimpse of infinity when we can see the boundary of what's obscured.