When the Sacred Scriptures are read in the Church, God himself speaks to his people, and Christ, present in his own word, proclaims the Gospel.

Therefore, all must listen with reverence to the readings from God’s word, for they make up an element of greatest importance in the Liturgy. Although in the readings from Sacred Scripture God’s word is addressed to all people of every era and is understandable to them, nevertheless, a fuller understanding and a greater effectiveness of the word is fostered by a living commentary on the word, that is, the homily, as part of the liturgical action.

General Instruction on the Roman Missal 29

The main part of the Liturgy of the Word is made up of the readings from Sacred Scripture together with the chants occurring between them. The homily, Profession of Faith, and Prayer of the Faithful, however, develop and conclude this part of the Mass. For in the readings, as explained by the homily, God speaks to his people, opening up to them the mystery of redemption and salvation, and offering them spiritual nourishment; and Christ himself is present in the midst of the faithful through his word. By their silence and singing the people make God’s word their own, and they also affirm their adherence to it by means of the Profession of Faith. Finally, having been nourished by it, they pour out their petitions in the Prayer of the Faithful for the needs of the entire Church and for the salvation of the whole world.

 General Instruction on the Roman Missal 55