 Mavrodes has subdivided non-manifestational varieties of revelation into two categories which he calls “the communication model” and “the causation model” (in addition to these, he suggests a “manifestation model”). In the communication model, revelation is understood as something analogous to speech and related linguistic activities. In the causation model, revelation happens by God causing beliefs in people, either from the beginning of a person’s existence, or at some later time (Mavrodes 1988: 73–74).