Kakfa, on letter writing as an intercourse with ghosts

"People have hardly ever deceived me, but letters always have... writing letters is like an intercourse with ghosts and by no means just with the ghost of the addressee but also with one's own ghost... how did people ever get the idea they could communicate with one another by letter!... writing letters is a means of 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."