Between Pride and Disappointment
The term revolution has become a cliché — it is in such common usage that we have forgotten it started its linguistic life as a metaphor. The metaphor was that of a wheel turning upon its axis. The idea, derived from that, is of sweeping change, reminding perhaps of the older, medieval idea of the wheel of fortune (to be found on the tarot card with that name, for example); bringing the mighty low and raising the lowly up on high.