 Tertullian is frequently cited in this connection as a textbook fideist. Developing a theme articulated by Paul in his First Letter to the Corinthians, Tertullian insisted that the truth of Christianity could be disclosed only by revelation, and that it must necessarily remain opaque to unregenerate philosophical  reason.[1]  In an oft-quoted passage he maintains (against Marcion) that the Biblical narrative of Christ’s death and resurrection “is by all means to be believed, because it is absurd…[T]he fact is certain, because it is impossible” (525).