Franz Kafka, letter to Max Brod, 5 July 1922

Writing sustains me. But wouldn’t it be more accurate to say that it sustains this kind of life? Which does not, of course, mean that my life is any better when I don’t write. On the contrary, at such times it is far worse, wholly unbearable, and inevitably ends in madness. This is, of course, only on the assumption that I am a writer even when I don’t write — which is indeed the case; and a non-writing writer is, in fact, a monster courting insanity.