“Someone who sees without hearing is much more uneasy than someone who hears without seeing…Interpersonal relationships in big cities  are distinguished by a marked preponderance of the activity of the eye over the activity of the ear. The main reason for this is the public means of transportation. Before the development of buses, railroads, and trams in the nineteenth century, people had never been in a position of having to look at one another for long minutes or even hours without speaking to one another.”