""Writing letters is actually an intercourse with ghosts and by no means just with the ghost of the addressee but also with one’s own ghost, which secretly evolves inside the letter one is writing or even in a whole series of letters, where one letter corroborates another and can refer to it as witness. How did people ever get the idea they could communicate with one another by letter! One can think about someone far away and one can hold on to someone nearby; everything else is beyond human power. Writing letters, on the other hand, means exposing oneself to the ghosts, who are greedily waiting precisely for that. Written kisses never arrive at their destination; the ghosts drink them up along the way. It is this ample nourishment which enables them to multiply so enormously. People sense this and struggle against it; in order to eliminate as much of the ghosts’ power as possible and to attain a natural intercourse, a tranquility of soul, they have invented trains, cars, aeroplanes — but nothing helps anymore: These are evidently inventions devised at the moment of crashing. The opposing side is so much calmer and stronger; after the postal system, the ghosts invented the telegraph, the telephone, the wireless. They will not starve, but we will perish. "
— Franz Kafka, Letters to Milena"