In this speech, Jonathan Edwards interacted with its audience as a prophet. This is because Edwards described to his audience what the risks of not believing were. He also wanted to persuade them to act according to the laws of God in order to avoid Hell. These are the type of statements that a prophet would normally be associated with.
its broadest sense, is a rhetorical device, literary technique, or event in which what appears, on the surface, to be the case, differs radically from what is actually the case.