The goal of Revelation is to bring encouragement to believers of all ages that God is working out His purposes even in the midst of tragedy, suffering, and apparent Satanic domination.  It is the Bible’s battle cry of victory, for in it, more than anywhere else in the NT, is revealed the final victory of God over all the forces of evil.  As such, it is an encouragement to God’s people to persevere in the assurance that their final reward is certain and to worship and glorify God despite trials and despite temptations to march to the world’s drumbeat.

– G.K. Beale in Revelation