III. The Holy Spirit and the Church in the Liturgy
Catechism number 1093
In the sacramental economy the Holy Spirit fulfills what was prefigured in the
Old Covenant. Since Christ's Church was "prepared in marvellous fashion in
the history of the people of Israel and in the Old Covenant,"14
The Church's liturgy has retained certain elements of the worship of the Old
Covenant as integral and irreplaceable, adopting them as her own:
-notably, reading the Old Testament;
-praying the Psalms;
-above all, recalling the saving events and significant realities which have
found their fulfillment in the mystery of Christ (promise and covenant, Exodus
and Passover, kingdom and temple, exile and return).