Late in his life, Hans-Georg Gadamer was asked to explain what the universal aspect of hermeneutics consisted in, and he replied, enigmatically, "in the verbum interius." Gadamer devoted a pivotal section of his magnum opus, Truth and Method, to this Augustinian concept, and subsequently pointed to it as a kind of passkey to his thought. It remains, however, both in its origins and its interpretations, a mysterious concept. From out of its layered history, it remains a provocation to thought, expressing something about the relation of language and understanding that has yet...