20 A significant consequence of the eschatological tension inherent in the Eucharist is also the fact that it spurs us on our journey through history and plants a seed of living hope in our daily commitment to the work before us. Certainly the Christian vision leads to the expectation of “new heavens” and “a new earth” ( Rev 21:1), but this increases, rather than lessens, our sense of responsibility for the world today . I wish to reaffirm this forcefully at the beginning of the new millennium, so that Christians will feel more obliged than ever not to neglect their duties as citizens in this world. Theirs is the task of contributing with the light of the Gospel to the building of a more human world, a world fully in harmony with God's plan. Many problems darken the horizon of our time. We need but think of the urgent need to work for peace, to base relationships between peoples on solid premises of justice and solidarity, and to defend human life from conception to its natural end. And what should we say of the thousand inconsistencies of a “globalized” world where the weakest, the most powerless and the poorest appear to have so little hope! It is in this world that Christian hope must shine forth! For this reason too, the Lord wished to remain with us in the Eucharist, making his presence in meal and sacrifice the promise of a humanity renewed by his love. Significantly, in their account of the Last Supper, the Synoptics recount the institution of the Eucharist, while the Gospel of John relates, as a way of bringing out its profound meaning, the account of the “washing of the feet”, in which Jesus appears as the teacher of communion and of service (cf. Jn 13:1-20). The Apostle Paul, for his part, says that it is “unworthy” of a Christian community to partake of the Lord's Supper amid division and indifference towards the poor (cf. 1 Cor 11:17-22, 27-34). Proclaiming the death of the Lord “until he comes” ( 1 Cor 11:26) entails that all who take part in the Eucharist be committed to changing their lives and making them in a certain way completely “Eucharistic”. It is this fruit of a transfigured existence and a commitment to transforming the world in accordance with the Gospel which splendidly illustrates the eschatological tension inherent in the celebration of the Eucharist and in the Christian life as a whole: “Come, Lord Jesus!” ( Rev 22:20).
Source: Ecclesia de Eucharistia (Vatican.va)