36. The "subject" of the liturgy's intrinsic beauty is Christ Himself, risen and glorified in the Holy Spirit, who includes the Church in His work. (109) Here we can recall an evocative phrase of Saint Augustine which strikingly describes this dynamic of faith proper to the Eucharist. The great Bishop of Hippo, speaking specifically of the eucharistic mystery, stresses the fact that Christ assimilates us to Himself: "The bread you see on the altar, sanctified by the word of God, is the body of Christ. The chalice, or rather, what the chalice contains, sanctified by the word of God, is the blood of Christ. In these signs, Christ the Lord willed to entrust to us His body and the blood which He shed for the forgiveness of our sins. If you have received them properly, you yourselves are what you have received." (110) Consequently, "not only have we become Christians, we have become Christ himself." (111) We can thus contemplate God's mysterious work, which brings about a profound unity between ourselves and the Lord Jesus: "one should not believe that Christ is in the head but not in the body; rather He is complete in the head and in the body." (112)
46. Given the importance of the word of God, the quality of homilies needs to be improved. The homily is "part of the liturgical action" (139), and is meant to foster a deeper understanding of the word of God, so that it can bear fruit in the lives of the faithful. Hence ordained ministers must "prepare the homily carefully, based on an adequate knowledge of Sacred Scripture" (140). Generic and abstract homilies should be avoided. In particular, I ask these ministers to preach in such a way that the homily closely relates the proclamation of the word of God to the sacramental celebration (141) and the life of the community, so that the word of God truly becomes the Church's vital nourishment and support (142). The catechetical and paraenetic aim of the homily should not be forgotten. During the course of the liturgical year it is appropriate to offer the faithful, prudently and on the basis of the three-year lectionary, "thematic" homilies treating the great themes of the Christian faith, on the basis of what has been authoritatively proposed by the Magisterium in the four "pillars" of the Catechism of the Catholic Church and the recent Compendium, namely: the profession of faith, the celebration of the Christian mystery, life in Christ and Christian prayer (143).
82. In discovering the beauty of the eucharistic form of the Christian life, we are also led to reflect on the moral energy it provides for sustaining the authentic freedom of the children of God. Here I wish to take up a discussion that took place during the Synod about the connection between the eucharistic form of life and moral transformation. Pope John Paul II stated that the moral life "has the value of a 'spiritual worship' (Rom 12:1; cf. Phil 3:3), flowing from and nourished by that inexhaustible source of holiness and glorification of God which is found in the sacraments, especially in the Eucharist: by sharing in the sacrifice of the Cross, the Christian partakes of Christ's self-giving love and is equipped and committed to live this same charity in all his thoughts and deeds" (228). In a word, "'worship' itself, eucharistic communion, includes the reality both of being loved and of loving others in turn. A Eucharist which does not pass over into the concrete practice of love is intrinsically fragmented" (229).
This appeal to the moral value of spiritual worship should not be interpreted in a merely moralistic way. It is before all else the joy-filled discovery of love at work in the hearts of those who accept the Lord's gift, abandon themselves to him and thus find true freedom. The moral transformation implicit in the new worship instituted by Christ is a heartfelt yearning to respond to the Lord's love with one's whole being, while remaining ever conscious of one's own weakness. This is clearly reflected in the Gospel story of Zacchaeus (cf. Lk 19:1-10). After welcoming Jesus to his home, the tax collector is completely changed: he decides to give half of his possessions to the poor and to repay fourfold those whom he had defrauded. The moral urgency born of welcoming Jesus into our lives is the fruit of gratitude for having experienced the Lord's unmerited closeness.