Canon 899. §1 The celebration of the Eucharist is an action of Christ himself and of the
Church. In it Christ the Lord, through the ministry of the priest, offers himself, substantially present under the appearances of bread and wine, to God the Father, and gives himself as spiritual nourishment to the faithful who are associated with him in his offering.

§2 In the eucharistic assembly the people of God are called together under the presidency of the Bishop or of a priest authorised by him, who acts in the person of
Christ. All the faithful present, whether clerics or lay people, unite to participate in their own way, according to their various orders and liturgical roles.

§3 The eucharistic celebration is to be so ordered that all the participants derive from it the many fruits for which Christ the Lord instituted the eucharistic Sacrifice.

§1. Eucharistica celebratio actio est ipsius Christi et Ecclesiae, in qua Christus Dominus, ministerio sacerdotis, semetipsum, sub speciebus panis et vini substantialiter praesentem, Deo Patri offert atque fidelibus in sua oblatione sociatis se praebet ut cibum spiritualem.

§2. In eucharistica Synaxi populus Dei in unum convocatur, Episcopo aut, sub eius auctoritate, presbytero praeside, personam Christi gerente, atque omnes qui intersunt fideles, sive clerici sive laici, suo quisque modo pro ordinum et liturgicorum munerum diversitate, participando concurrunt.

§3. Celebratio eucharistica ita ordinetur, ut omnes participantes exinde plurimos capiant fructus, ad quos obtinendos Christus Dominus Sacrificium eucharisticum instituit.