The Church is nourished spiritually at the table of God’s word and at the table of the eucharist: from the one it grows in wisdom and from the other in holiness. In the word of God the divine covenant is announced; in the eucharist the new and everlasting covenant is renewed. The spoken word of God brings to mind the history of salvation; the eucharist embodies it in the sacramental signs of the liturgy.
(Introduction to the Lectionary for Mass, article 10)
Recently we looked at the increased use of scripture in liturgical celebrations since the Second Vatican Council. The ambo, then, as the place where the scriptures are proclaimed, needs to be a permanent, prominent place suitable for its liturgical function. Its use is reserved to the proclamation of the readings, the responsorial psalm and the Easter proclmation. It may also be used for the homily and the prayer of the faithful.
There must be a place in the church that is somewhat elevated, fixed, and of a suitable design and nobility. It should reflect the dignity of God’s word and be a clear reminder to the people that in the Mass the table of God’s word and of Christ’s body is placed before them. The place for the readings must also truly help the people’s listening and attention during the liturgy of the word. Great pains must therefore be taken, in keeping with the design of each church, over the harmonious and close relationship of the lectern with the altar.
(Introduction, article 32)