The two principal parts of the Holy Sacrifice of the Mass are: (1) the Liturgy of the Word and (2) the Liturgy of the Eucharist. The Liturgy of the Word includes the Scripture readings together with the homily, the Profession of Faith, and the Prayer of the Faithful. The Liturgy of the Eucharist has three stages: (1) the Offertory rite; …

The Holy Mass is offered to give adoration and glory to God the Father, to give praise and thanks for Christ’s immeasurable love for us, to intercede for those in need, and to obtain forgiveness of sins and the remission of the punishment for sins.

Lay people participate in the Mass by the reception of Holy Communion, and by fully exercising their status as members of the priesthood of the faithful. For example, they offer the Victim, Jesus Christ, and themselves, not only through the hands of the priest, but also with him.