Found in the detritus of my old documents:

You are suffering from a sickness, one that is fashionable, unfortunately, and that one comes across every day among sensitive people. It is related to moral insanity and can also be called individualism or imaginary loneliness. Modern books are full of it. It has insinuated itself into your imagination; you are isolated; no one troubles about you and no one understands you. Am I right?..... Listen. Those who suffer from this illness need only a couple of disappointments to make them believe that there is no link between them and other people, that all people go about in a state of complete loneliness, that they never really understand each other, share anything or have anything in common. It also happens that people who suffer from this sickness become arrogant and regard all other healthy people who can understand and love each other as flocks of sheep. If this sickness were general, the human race would die out...
— Hermann Hesse, Gertrude