Nahum 1:1 uses two words "burden" and "vision". In Hebrew "mass" and "chaza". Every believer should learn to wait in the presence of the Lord until the Lord transfers his burden to your heart and begin to see into the future. Isaiah had an encounter and was asked the question who will go for us? He responded saying, here am I, send me. To become a prophet the Lord calls a person and the person also responds and says here am I, send me. Nahum sees the battle and Nineveh destroyed. See the graphic details of the army marching into the streets of Nineveh.