The man asks because he knows the awkward passing: that moment when running into a familiar face, debating whether or not to wave or say "hi" but end up not doing anything.
His friend, George Lincoln, tells him, "Good, how are you?"
He will not know, however, because they both continue walking in opposite directions becoming too far apart to communicate. Indeed, their communication was largely socially polite. Disregarding these unwritten rules results in an uncomfortable silence and an even awkwarder next encounter. Polite speech is invaluable.
Yet, why in books, movies, and TV are there never these moments? (except those highly exaggerated stints of awkwardness that are 100x worse). That's because there's always something to talk about. There's always a discussion to be had. Everyone is happy to be part of their wonderful social environment.
Face to face communication is very personal and can revitalize a person's day. Anything that comes to mind can spin into a fascinating or informational conversation which in turn can spread to others. In truth, not all stories capture the attention of every pedestrian, but simply the act of being spoken can make any person's day.
However, in reality, ideas for small talk don't always instantly come to mind the second people meet. That's why polite talk exists. All to avoid the nasty awkward passing. But if everyone talked politely the world would be boring and superficial. So, please, converse.
