‘People who think that all sensations reach us through the eye and the ear have expressed surprise that I should notice any difference, except possibly the absence of pavements, between walking in city streets and in country roads. They forget that my whole body is alive to the conditions about me. (...) The grinding of heavy wagons on hard pavements and the monotonous clangour of machinery are all the more torturing to the nerves if one's attention is not diverted by the panorama that is always present in the noisy streets to people who can see.’

​[Helen Keller, The story of my life]