The Blessed Trinity's love for man is made permanent in a sublime way through the Eucharist. Many years ago, we all learned from our catechism that the Eucharist can be considered as a sacrifice and as a sacrament; and that the sacrament is present to us both in communion and as a treasure on the altar, in the tabernacle. The Church dedicates another feast to the eucharistic mystery — the feast of the body of Christ, Corpus Christi, present in all the tabernacles of the world. Today, on Holy Thursday, we can turn our attention to the holy Eucharist as our sacrifice and as our nourishment, in the holy Mass and in communion.

I was talking to you about the love of the Blessed Trinity for man. And where can we see this more clearly than in the Mass? The three divine Persons act together in the holy sacrifice of the altar. This is why I like to repeat the final words of the collect, secret and postcommunion: "Through Jesus Christ, your Son, our Lord," we pray to God the Father, "who lives and reigns with you in the unity of the Holy Spirit, one God, forever and ever. Amen."

In the Mass, our prayer to God the Father is constant. The priest represents the eternal high priest, Jesus Christ, who is, at the same time, the victim offered in this sacrifice. And the action of the Holy Spirit in the Mass is truly present, although in a mysterious manner. "By the power of the Holy Spirit," writes St John Damascene, "the transformation of the bread into the body of Christ takes place."

The action of the Holy Spirit is clearly expressed when the priest invokes the divine blessing on the offerings: "Come, Sanctifier, almighty and eternal God, and bless this sacrifice prepared in honour of your holy name" — the holocaust that will give to the holy name of God the glory that is due. The sanctification we pray for is attributed to the Paraclete, who is sent to us by the Father and the Son. And we also recognize the active presence of the Holy Spirit in this sacrifice, as we say, shortly before communion: "Lord Jesus Christ, who, by the will of the Father, with the cooperation of the Holy Spirit, by your death have brought life to the world…"