24 The nations will walk by its light, and the kings of the earth will bring their glory into it.
“The nations” Refers to different races within the believers.
“the kings of the earth” Reveals different positions in the new earth that believers will inherit due to what they did for the Lord while they were on the old earth.
25 Its gates will never close by day because it will never be night there.
The Lamb [Jesus] and the Father [God Almighty] will be the light of the new earth [verse 23]. Darkness represents sin and since it will no longer exist neither will night. Our bodies will be like Christ’s which needs no rest.
26 They will bring the glory and honor of the nations into it.
The nations will bring into the new city, Jerusalem that which Christ has given them [glory and honor], the nations will worship the Lamb and the Lord God.
27 Nothing unclean will ever enter it, nor anyone who does what is detestable or false, but only those written in the Lamb’s book of life.
“Nothing unclean will ever enter it” Refers to those who did not wash their sins away by the blood of the Lamb. Satan and his fallen angels can not enter there, for they are unclean spirits and the unclean are assigned to the Lake of Fire.
“detestable or false” Both meaning the same thing, like those who claim to be Christians but were false teachers, are detestable to the Lord and false religion of all kinds is detestable to the Lord.
The only ones who are going to be with Jesus, are those who gave their lives to Him and worshipped Him as Lord of lords and King of kings.
“those written in the Lamb’s book of life”
Jesus said in Luke 10:19-20, 19 Look, I have given you the authority to trample on snakes and scorpions and over all the power of the enemy; nothing at all will harm you. 20 However, don’t rejoice that the spirits submit to you, but rejoice that your names are written in heaven.”
The believers will rejoice in heaven because they will rest from all their labors [their work for the Lord] and no longer will they be in a fallen world of sin of tribulations and sufferings. But, the greatest joy besides being with Jesus is not being apart from Him like those who did not have their names written in the Lamb’s Book of Life and are in hell for all eternity.