Dallin H. Oaks: In its more familiar forms, revelation or inspiration comes by means of words or thoughts communicated to the mind (see D&C 8:2–3; Enos 1:10), by sudden enlightenment (see D&C 6:14–15), by positive or negative feelings about proposed courses of action, or even by inspiring performances, as in the performing arts. As Elder Boyd K. Packer has stated, “Inspiration comes more as a feeling than as a sound” (Boyd K. Packer, “Prayers and Answers,” General Conference, October 1979).
I can identify eight different purposes served by communication from God: (1) to testify; (2) to prophesy; (3) to comfort; (4) to uplift; (5) to inform; (6) to restrain: (7) to confirm: (8) to impel.
(Book: "The Lord’s Way," [1991], p. 24;
quoted in Liahona, Dec 1983, p. 30)