The beauty of watching cars drive past on a busy street is inexplicable. When you're walking along, You barely notice them But, In every car, there is a person with thoughts, and feelings, and a life just as complicated and meaningful as yours. You see them once, and then they're gone.
Every day, we see so many people that we never stop to notice. They, like extras in a movie, are the background in our seemingly mundane adventures. This arrangement is only acceptable because that is exactly what we are to them.