Minor Prophets by Ingimar DeRidder, Haggai - Prophet on Duty

Minor Prophets - Introduction
God’s Voice
The prophets were the voice of God.
While the priesthood was governed by genetics and genealogies,
prophetism was pure grace. A man could become an officer in the temple
by being a descendant of Levi or a son of Aaron, but to be a prophet
required a personal call. What made a man a false prophet was simply
this: they were not called. Jeremiah spoke of false prophets "The
prophets prophesy lies in my name; I sent them not, neither have I
commanded them" (14:14). To another false prophet Jeremiah said
"The LORD hath not sent thee, but thou makest these people to
trust in a lie" (28:15).