Galatians 3:13-14, “Christ redeemed us…that we might receive the promise of the Spirit” parallels the throne of God and of the Lamb from which comes the river of water of life in New Jerusalem. In Galatians 3 we receive the Spirit by the hearing of faith (v. 2, 5).
To have hearing we also need speaking. We should not depend on a select few to speak. Rather, as Ephesians 5:18b-19 says, we should “be filled in spirit, speaking to one another in psalms and hymns and spiritual songs, singing and psalming with your heart to the Lord.”
The psalms, hymns, and songs may be directly from the word of God or may express what we see in the word of God. When we are filled in spirit and speak, others will have the hearing of faith and receive the Spirit. Then others may speak and we receive the Spirit. This mutual, spiritual speaking and hearing expresses the reality of the Body of Christ.
Colossians 3:16 is very similar: “Let the word of Christ dwell in you richly in all wisdom, teaching and admonishing one another with psalms and hymns and spiritual songs, singing with grace in your hearts to God.” The word dwells/lives in us. The word of God living in us corresponds with our being filled in spirit in Ephesians 5.
Both Ephesians and Colossians include singing—with grace, with our hearts, to the Lord.
Surely New Jerusalem will be full of the Spirit and full of the living word. There we will still be speaking and hearing the living words, the words of the faith. New Jerusalem will probably also be full of our singing to the Lord.