Welcome to Prophecy Q & A with Jimmy DeYoung!
No, I cannot find that anywhere in Scripture. I also talked to some theologians who also could not point me to any Scripture that says that. Therefore, I would have to conclude that there is no place in Scripture where Millennial saints will have their bodies changed from mortal bodies to immortal bodies, meaning that they will live forever in their mortal body. That would seem to indicate that you will have children in the future who will have a sin nature. It doesn’t mean that they are not saved people. We still have the capability of sinning (1 John 1:9 – He will cleanse us from all unrighteousness). This is for Christians, and this is what we do to stay in fellowship with God. The whole purpose of 1 John is fellowship with God. One of the reasons that the sacrificial system is going to be reinstituted during the Millennial Kingdom (Ezekiel 45) is to restore fellowship. It never took away sins permanently, even in Old Testament times. It simply covered the sins until Jesus Christ came.
How will the Millennial bodies sustain life? Revelation 2:7 says that all of those who are overcomers (overcomers are defined by 1 John 5:4 as those who know Jesus Christ as Lord and Savior) will be able to eat of the tree of life in Paradise or the Garden of God. When Adam and Eve had sinned, they went back to the Garden of Eden, but God put the cherubim to guard the entrance to the Garden of Eden because if Adam and Eve had eaten of the Tree of Life, they would live forever in their sin. This is how they sustain life for 1,000 years. In Revelation 22:2, there is going to be a tree of life in the New Jerusalem which will be hovering over the Earth not on the Earth.
Jimmy DeYoung was a prophecy teacher and journalist who travelled the country and the world educating the Body of Christ of the future events foretold in God’s prophetic Word. His goal was to equip Christians with the knowledge and understanding of what God’s Word says will happen someday soon, so that they can make better decisions today. Dr. DeYoung went home to be with his Savior on August 15, 2021.