Theme: Whoever wants to be great in Jesus' kingdom must, first, become the servant of everyone else.

Theme: John is given a vision of two great, symbolic 'reapings' of the earth before the outpouring of God's wrath after the tribulation.

Theme: Before the outpouring of His wrath, God will provide three angelic beings in the skies to issue a merciful call for repentance to the people of the world below.