[De articulis fidei]

¶ Regarding this sacrament, there is an error of certain Greeks who say that a simple priest can perform this sacrament. Against them, it is said in Acts 8 that the apostles sent Peter and John, the apostles, who laid hands upon those who had been baptized by Philip the deacon, and they received the Holy Spirit. Bishops, however, are in the Church in the place of the apostles, and in the place of the laying on of hands, confirmation is given in the churches.

Concerning the third sacrament

The third sacrament is that of the eucharist, the matter of which is wheat bread and wine from the vine, mixed with a little water, such that the water passes into the wine. For the water signifies the people who are incorporated into Christ. From other bread that is not wheat, and from other wine that is not of the vine, this sacrament cannot be performed. The form of this sacrament, however, are the words of Christ saying: "This is my body and this is the chalice of my blood of the new and eternal testament, the mystery of faith, which shall be shed for you and for many unto the remission of sins." A priest, speaking in the person of Christ, performs this sacrament. The minister of this sacrament is a priest, and no one else can perform the body of Christ. The effect of this sacrament is twofold. The first of these consists in the very consecration of the sacrament. For by the power of the aforementioned words, bread is converted into the body of Christ and wine into his blood. Yet so that the whole of Christ is contained under the species of bread, which remain without a subject, and the whole of Christ is under the species of wine; and under any part of the consecrated host or consecrated wine, a separation having been made, the whole of Christ is there. The other effect of this sacrament, which it works in the soul of the one who receives it worthily, is the union of the person to Christ, just as He Himself says in John 6: "He who eats my flesh and drinks my blood, he remains in me and I in him." And because by grace a person is incorporated into Christ