Nahum prophesied during the reign of Hezekiah, probably about one hundred and fifty years after Jonah. He has but one subject--the destruction of Nineveh. According to Diodorus Siculus, the city was destroyed nearly a century later, precisely as here predicted. The prophecy is one continuous strain which does not yield to analysis. The moral theme is: the holiness of Jehovah which must deal with sin in judgment.