Smith's Bible Dictionary (1863)
—We learn from Holy Scripture that it was by the agency of the Spirit of God that the prophets received the divine communication; but the means by which the divine Spirit communicated with the human spirit, and the conditions of the latter under which the divine communications were received, have not been clearly declared to us. They are however, indicated. In (Numbers 12:6-8) we have an exhaustive division of the different ways in which the revelations of God are made to man.