The invention of the devil. If we are possessed by the devil, it cannot be by one, for then we should live, at least here on earth, quietly, as with God, in unity, without contradiction, without reflection, always sure of the man behind us. His face would not frighten us, for as diabolical beings we would, if somewhat sensitive to the sight, be clever enough to prefer to sacrifice a hand in order to keep his face covered with it. If we were possessed by only a single devil, one who had a calm, untroubled view of our whole nature, and freedom to dispose of us at any moment, then that devil would also have enough power to hold us for the length of a human life high above the spirit of God in us, and even to swing us to and fro, so that we should never get to see a glimmer of it and therefore should not be troubled from that quarter. Only a crowd of devils could account for our earthly misfortunes. Why don’t they exterminate one another until only a single one is left, or why don’t they subordinate themselves to one great devil? Either way would be in accord with the diabolical principle of deceiving us as completely as possible. With unity lacking, of what use is the scrupulous attention all the devils pay us? It simply goes without saying that the falling of a human hair must matter more to the devil than to God, since the devil really loses that hair and God does not. But we still do not arrive at any state of well-being so long as the many devils are within us.
— Kafka, Diaries (trans. J. Kresch)