There is a narrow thread in the vast literature on Kafka which pertains to Kafka’s knowledge of philosophy, and more precisely to Kafka’s use in his fictional writings of some of the main ideas of Franz Brentano. Kafka attended courses in philosophy at the Charles University given by Brentano’s students Anton Marty and Christian von Ehrenfels, and was for several years a member of a discussion-group organized by orthodox adherents of the Brentanian philosophy in Prague. The present essay summarizes what is known about Kafka’s relations to the Brentanist movement. It draws on Brentanian ideas on the evidence of inner perception, on oblique consciousness, on active introspection, on correct and incorrect judgment, and on consciousness as a sp...