Old Faithful is a natural example of consistency. This famous geyser erupts an average of every ninety minutes with incredible consistency: http://www.geyserstudy.org/geyser.aspx?pGeyserNo=OLDFAITHFUL. However, even the most faithful and consistent things in nature cannot compare with the strength and faithfulness of God who has not changed or varied for eternity. The eternal, consistent faithfulness of God serves to buoy our unfaithful and inconsistent lives by continually pressing us back to him.