"The Eucharist is not merely an expression of communion in the Church's life; it is also a project of solidarity for all of humanity. In the celebration of the Eucharist the Church constantly renews her awareness of being a 'sign and instrument' not only of intimate union with God but also of the unity of the whole human race. Each Mass, even when celebrated in obscurity or in isolation, always has a universal character. The Christian who takes part in the Eucharist learns to become a promotor of communion, peace and solidarity in every situation. More than ever, our troubled world, which began the new Millennium with the spectre of terrorism and the tragedy of war, demands that Christians learn to experience the Eucharist as a great school of peace, forming men and women who, at various levels of responsibility in social, cultural and political life, can become promotors of dialogue and communion."
John Paul II, Apostolic Letter Mane Nobiscum Domine, 27