A mood swing is an extreme or rapid change in mood. Such mood swings can play a positive part in promoting problem solving and in producing flexible forward planning.
However when these changes start to become controlling, mood swings can start to adversely affect the way someone functions.
Famous quotes containing the words mood and/or swing:
“The child ... stands upon a place apart, a little spectator of the world, before whom men and women come and go, events fall out, years open their slow story and are noted or let go as his mood chances to serve them. The play touches him not. He but looks on, thinks his own thought, and turns away, not even expecting his cue to enter the plot and speak. He waits,—he knows not for what.”
—Woodrow Wilson (1856–1924)
“Neither moral relations nor the moral law can swing in vacuo. Their only habitat can be a mind which feels them; and no world composed of merely physical facts can possibly be a world to which ethical propositions apply.”
—William James (1842–1910)