Paragraph 16. When the Church offers praise to God in the liturgy of the hours, it unites itself with that hymn of praise sung throughout all ages in the halls of heaven; it also receives a foretaste of the song of praise in heaven, described by John in the Book of Revelation, the song sung continually before the throne of God and of the Lamb. Our close union with the Church in heaven is given effective voice "when we all, from every tribe and tongue and people and nation redeemed by Christ's blood (see Rv 5:9) and gathered together into the one Church, glorify the triune God with one hymn of praise."

The prophets came almost to a vision of this liturgy of heaven as the victory of a day without night, of a light without darkness: "The sun will no more be your light by day, and the brightness of the moon will not shine upon you, but the Lord will be your everlasting light" (Is 60:19; see Rv 21:23 and 25). "There will be a single day, known to the Lord, not day and night, and at evening there will be light" (Zech 14:7). Already "the end of the ages has come upon us (see I Cor 10:11) and the renewal of the world has been irrevocably established and in a true sense is being anticipated in this world." By faith we too are taught the meaning of our temporal life, so that we look forward with all creation to the revealing of God's children. In the liturgy of the hours we proclaim this faith, we express and nourish this hope, we share in some degree the joy of everlasting praise and of that day that knows no setting.