A distinct genre of Jewish and Christian writing that emerged in the intertestamental period and flourished from about 250 BC to AD 200. Greek apokalypsis — "unveiling, revelation." Apocalyptic literature claims to disclose heavenly realities and the outcome of history through visions and symbols. Canonical biblical examples: the book of Daniel (chapters 7-12), Zechariah 9-14, Ezekiel 38-39, Isaiah 24-27, Mark 13, and especially the Revelation of John. Non-canonical Jewish apocalyptic writings include 1 Enoch, 4 Ezra, 2 Baruch, and the sectarian literature from Qumran.
Apocalyptic literature has its own grammar, and readers who approach it like a newspaper editorial misread it catastrophically. Five features. (1) Symbolic imagery — beasts, horns, bowls, seals, trumpets, colors, numbers all function as symbols with specific historical and theological referents. The 666 of Revelation 13:18 is not a literal address; it is a symbolic name pointing (likely) to Nero. (2) Cosmic dualism — the conflict is between God and Satan, good and evil, light and darkness, often staged at multiple levels simultaneously (heavenly, earthly, political). (3) Historical review and preview — many apocalyptic texts survey history from a set vantage point, moving toward a climactic divine intervention. (4) Pastoral purpose — apocalyptic literature is not written primarily to satisfy curiosity about the future. It is written to suffering saints in crisis, to give them the long view — the wider reality that their temporary persecutions are part of a story whose ending is already secured by the Lamb on the throne. Revelation was written to seven churches under Roman pressure to comfort and strengthen them. (5) Victory over empire — pagan world powers are exposed as beasts and whores; Rome is Babylon; the persecuted saints are the true Jerusalem. Apocalyptic theology is countercultural political theology. Read this way — symbolically, pastorally, victoriously — the book of Revelation transforms from a puzzle-box for end-times speculators into a pastoral stimulant for suffering saints. Read it aloud in a persecuted church and it lands with force.