God's promise and Jesus Christ's resurrection raise in Christians the well-founded hope that a new and eternal dwelling place is prepared for every human person, a new earth where justice abides (cf. 2 Cor 5:1-2; 2 Pet 3:13). “Then, with death conquered, the children of God will be raised in Christ and what was sown in weakness and corruption will be clothed in incorruptibility: charity and its works will remain and all of creation, which God made for man, will be set free from its bondage to vanity”68Second Vatican Ecumenical Council, Pastoral Constitution Gaudium et Spes, 39: AAS 58 (1966), 1057.. This hope, rather than weaken, must instead strengthen concern for the work that is needed in the present reality.
The good things — such as human dignity, brotherhood and freedom, all the good fruits of nature and of human enterprise — that in the Lord's Spirit and according to his command have spread throughout the earth, having been purified of every stain, illuminated and transfigured, belong to the Kingdom of truth and life, of holiness and grace, of justice, of love and of peace that Christ will present to the Father, and it is there that we shall once again find them. The words of Christ in their solemn truth will then resound for all people: “Come, O blessed of my Father, inherit the kingdom prepared for you from the foundation of the world; for I was hungry and you gave me food, I was thirsty and you gave me drink, I was a stranger and you welcomed me, I was naked and you clothed me, I was sick and you visited me, I was in prison and you came to me ... as you did it to one of the least of my brethren, you did it to me” (Mt 25:34-36,40).
The complete fulfilment of the human person, achieved in Christ through the gift of the Spirit, develops in history and is mediated by personal relationships with other people, relationships that in turn reach perfection thanks to the commitment made to improve the world, in justice and peace. Human activity in history is of itself significant and effective for the definitive establishment of the Kingdom, although this remains a free gift of God, completely transcendent. Such activity, when it respects the objective order of temporal reality and is enlightened by truth and love, becomes an instrument for making justice and peace ever more fully and integrally present, and anticipates in our own day the promised Kingdom. Conforming himself to Christ the Redeemer, man perceives himself as a creature willed by God and eternally chosen by him, called to grace and glory in all the fullness of the mystery in which he has become a sharer in Jesus Christ69Cf. John Paul II, Encyclical Letter Redemptor Hominis, 13: AAS 71 (1979), 283-284.. Being conformed to Christ and contemplating his face 70Cf. John Paul II, Apostolic Letter Novo Millennio Ineunte, 16-28: AAS 93 (2001), 276-285. instil in Christians an irrepressible longing for a foretaste in this world, in the context of human relationships, of what will be a reality in the definitive world to come; thus Christians strive to give food, drink, clothing, shelter, care, a welcome and company to the Lord who knocks at the door (cf. Mt 25:35-37).