When Ezekiel learns of the trees that would grow alongside the river, he is told: “Their leafage will not wither, nor will their fruitage be consumed. . . . And their fruitage must prove to be for food and their leafage for healing.” Why do these trees produce in this amazing manner? “Because the water for them​—it is coming forth from the very sanctuary.” (Ezekiel 47:12b) These symbolic trees foreshadow all of God’s provisions for restoring mankind to perfection on the basis of Jesus’ ransom sacrifice. On earth at this time, the anointed remnant takes the lead in providing spiritual nourishment and healing. After the 144,000 have all received their heavenly reward, the benefits stemming from their priestly service as corulers with Christ will extend into the future, ultimately leading to the complete conquest of Adamic death.​—Revelation 5:9, 10; 21:2-4.

17, 18. (a) How is a life-giving river described at Revelation 22:1, 2, and when is the primary time of application for that vision? (b) In Paradise, why will the river of water of life see a time of great expansion?

¹⁷ In effect, the river seen by Ezekiel will then flow with the most potent water of life. This is the primary time of application for the prophecy recorded at Revelation 22:1, 2: “He showed me a river of water of life, clear as crystal, flowing out from the throne of God and of the Lamb down the middle of its broad way. And on this side of the river and on that side there were trees of life producing twelve crops of fruit, yielding their fruits each month. And the leaves of the trees were for the curing of the nations.”

¹⁸ During the Millennium, all illnesses​—physical, mental, and emotional—​will be healed. This is well pictured by “the curing of the nations” by means of the symbolic trees. Thanks to the provisions administered by Christ and the 144,000, “no resident will say: ‘I am sick.’” (Isaiah 33:24)