It is believed that the OT prophetic books were written between the fifth and sixth centuries B.C. Hundreds of years later, however, the Apocalyptic genre is thought to have been "invented" in the third or second century B.C. After the silent era in Jewish history, during which there was neither a "open vision" nor a "spoken word from God," this would occur. Some claim that the purpose of the Apocalypses was to reassure Jews of their destiny and to uplift them during difficult times. I am aware of a Jewish genre that went by this name. So are they to be understood in the same sense as the writings of the prophets? Do their images and styles differ enough to warrant using various hermeneutic approaches? Should we read Revelation as an instruction manual or as a prophecy?