Chapters 21 and 22 are a description of the eternal state following the Millennium and the final judgment of the lost, along with the destruction of the old earth.
New Jerusalem, Made New, Old Things
John warns peopel of the comming of God. He is direct and pounds guilt into his hearers.
Repentance, Warning, Old Things
Chapter 21 begins a new section of the Book of Revelation: all of the judgments, the deaths, heartaches and pains are finally gone for ever, its simple beyond our mental comprehensions of such harmony and perfect peace. In this chapter we see that the his
Beauty, Unique, Remember, Change, Made New, Old Things
God calls us to value the past, but not to dwell in the past, and he calls us to live in the new, so we can see the new things God is doing.
New Thing, Old Things, God Brings Hope, God Brings Purpose