The end of the book of Revelation is the describes a culmination of all the end time events. It is the return of the Lamb, the holy city, the bride/the people of God in the presence of God. No more tears, no more pain, no more influence of sin and evil. It is as God originally intended it to be, humanity experiencing uninhibited fellowship with the Creator. In the final passage, the Spirit beckons the Son to come and the Spirit beckons us to come to the Son!