“The goal of the kingdom achieved in Revelation is described as a city, a people, and a conquering King. From the throne of this King comes a river with water (Rev. 22:1-2; think Gen. 2:10 and Ezek. 47:1-12), and on either side of the river is the tree of life with its twelve kinds of fruit for the healing of nations.
As Genesis began with the garden and the tree of life, now Revelation closes with a garden city and a tree that heals all the nations. Genesis began with a marriage; so also Revelation finishes with the wedding feast of the Lamb.
The twelve kinds of fruit harken us back to the promise made to Abrahams offspring, that they would bring blessings to the whole world. They are the chosen people through whom God established His kingdom.
The Messiah has come to fulfill the destiny of Israel’s seed in feeding all the nations. Israels hopes were too small. The tree that bore their king transformed into a source of life for the entire world.
Streaming into the city are the kings of the earth who come to give their glory to the King of kings, who reigns over all people. The tree of the knowledge of good and evil seemed to send the kingdom plan on a downward spiral, but it was through the tree of the cross that the kingdom was fulfilled.
Now the tree of life consummates the kingdom story started so long ago. The dragon is slain; the Lamb has won; the people are free; they are home.”
–Patrick Schreiner, The Kingdom of God and the Glory of the Cross (Wheaton, IL: Crossway, 2018), 130-131.