Rev 21:23  "And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof."

Since this city is not a natural city, but a spiritual city, designed to offer up spiritual sacrifices, there is no need for the natural light of the sun and the moon to shine in this city. Jesus said, "I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life" (John 8:12). We read about Jesus in John 1:4 "In him was life; and the life was the light of men. 5 And the light shineth in darkness; and the darkness comprehended it not. 6 There was a man sent from God, whose name was John. 7 The same came for a witness, to bear witness of the Light, that all men through him might believe. 8 He was not that Light, but was sent to bear witness of that Light. 9 That was the true Light, which lighteth every man that cometh into the world."

We gather the following from the above:
1. It is the eternal life of Jesus Christ that is the light of men.
2. The "all men" are the "all men" of the "elect world."
3. The "world" to which every man cometh into is a spiritual world and not a natural world.
4. The light that those men have is the result of Christ, the "true Light" lighting them.
God causes his light to shine not only in this city, but also in the hearts of the citizens of this city: 2 Cor. 4:6 "For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ." Notice that Jesus Christ is in our hearts when God gives the light of the knowledge of the glory of God to us in our hearts.
Jesus is said to be "great light:" Matt. 4:16 "The people which sat in darkness saw great light; and to them which sat in the region and shadow of death light is sprung up."

Furthermore, Jesus has sent the light of the gospel to give us knowledge of life and immortality and to guide us into all truth.  Not only is the natural light of the sun and moon not needed in this city, but the light of the old law service is also not needed in this city, as our Lamb hath fulfilled the law to a jot and a tittle and hath made us righteous through his shed blood.

Rev 21:24-27 "And the nations of them which are saved shall walk in the light of it: and the kings of the earth do bring their glory and honour into it. 25 And the gates of it shall not be shut at all by day: for there shall be no night there. 26 And they shall bring the glory and honour of the nations into it. 27 And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb's book of life."

"And the nations of them which are saved." These are not nations such as United States and Canada and Mexico. These nations have each been given a government and laws by their head. These nations are each local church of the Lord Jesus Christ. First, they are saved from the condemnation and bondage of sin by the shed blood of Jesus Christ and the quickening power of the Holy Spirit.

Furthermore, they are saved from ignorance through the gospel of Jesus Christ. They are saved from going about to establish their own righteousness and they are saved from false worship and false religious systems.

"Shall walk in the light of it." The light in which they are walking is the glory of God and the light of the Lamb. It is by the light of the glory of God and the light of the Lamb that we are able to see the Kingdom of God and to press into it. It is also by that light that we are able to serve God and worship him in Spirit and in truth.

"And the kings of the earth do bring their glory and honour into it." The "kings of the earth" are the kings mentioned in Rev. 1:5 "Unto him that loved us, and washed us from our sins in his own blood, 6 And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen."

We have been made kings unto God and have been given the privilege of reigning in life by one, Jesus Christ. We do not have any glory of our own. We are made glorious by the shed blood of Jesus Christ who according to 2 Cor. 5:21 "For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him." In the new birth, God imputed the righteousness of Jesus Christ unto us. Any good thing or good works that we do, we do as the result of having been "created in Christ Jesus unto good works." Our resurrection and change to be fashioned like the glorious body of Jesus Christ will be totally by the power of God. Any good thing we do, we do through the knowledge that God has given us in his word (2 Tim. 3:16, 17). Thus any glory and honour that we bring into the church we do by the leadership and working of the Holy Spirit and to God belongs all the praise and glory.

"And the gates of it shall not be shut at all by day: for there shall be no night there." Obviously, this is a spiritual view of the church. While we walk in the Spirit we have the light of God and the Lamb. We also have the light of God's word, which is a "lamp unto my feet and a light unto my path." These lamps never go out. We may shut our eyes, or go to sleep, or walk out of the church into darkness, but God's lamp is forever burning within His church. Furthermore, the gates of the church are ever open to God's seeking, asking, and knocking people that they may enter into the church of the Lord Jesus Christ.

"And they shall bring the glory and honour of the nations into it." The Lord's Church is composed of all the local churches. The glory and honour of the local churches is the glory and honour that the Lord gives them. The Lord is praised and honoured in their worship and in their service to him. They are ever pointing to the Lord and not to themselves.

"And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb's book of life." Were these at one time, defiled? Or, did they at one time work abomination? Have they at one time made a lie? The answer is yes, but we read in 1 Cor. 6:11 "And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God." In addition, we read in Rom. 8:33 "Who shall lay any thing to the charge of God's elect? It is God that justifieth." Our standing before God is in the imputed righteousness of Jesus Christ. There is no charge that can be laid against us. The only ones who can enter into the Lord's church are those who were chosen in Christ before the foundation of the world and whose name's were written in the Lamb's book of life before the foundation of the world.