The revelation in Christ of the mystery of God as Trinitarian love is at the same time the revelation of the vocation of the human person to love. This revelation sheds light on every aspect of the personal dignity and freedom of men and women, and on the depths of their social nature. “Being a person in the image and likeness of God ... involves existing in a relationship, in relation to the other ‘I'”36John Paul II, Apostolic Letter Mulieris Dignitatem, 7: AAS 80 (1988), 1664., because God himself, one and triune, is the communion of the Father, of the Son and of the Holy Spirit. In the communion of love that is God, and in which the Three Divine Persons mutually love one another and are the One God, the human person is called to discover the origin and goal of his existence and of history. The Council Fathers, in the Pastoral Constitution Gaudium et Spes, teach that “the Lord Jesus Christ, when praying to the Father ‘that they may all be one ... as we are one' (Jn 17:21-22), has opened up new horizons closed to human reason by implying that there is a certain parallel between the union existing among the divine Persons and the union of the children of God in truth and love. It follows, then, that if man is the only creature on earth that God has willed for its own sake, man can fully discover his true self only in a sincere giving of himself (cf. Lk 17:33)”37Second Vatican Ecumenical Council, Pastoral Constitution Gaudium et Spes, 24: AAS 58 (1966), 1045..
Christian revelation shines a new light on the identity, the vocation and the ultimate destiny of the human person and the human race. Every person is created by God, loved and saved in Jesus Christ, and fulfils himself by creating a network of multiple relationships of love, justice and solidarity with other persons while he goes about his various activities in the world. Human activity, when it aims at promoting the integral dignity and vocation of the person, the quality of living conditions and the meeting in solidarity of peoples and nations, is in accordance with the plan of God, who does not fail to show his love and providence to his children.
The pages of the first book of Sacred Scripture, which describe the creation of man and woman in the image and likeness of God (cf. Gen 1:26-27), contain a fundamental teaching with regard to the identity and the vocation of the human person. They tell us that the creation of man and woman is a free and gratuitous act of God; that man and woman, because they are free and intelligent, represent the “thou” created by God and that only in relationship with him can they discover and fulfil the authentic and complete meaning of their personal and social lives; that in their complementarities and reciprocity they are the image of Trinitarian Love in the created universe; that to them, as the culmination of creation, the Creator has entrusted the task of ordering created nature according to his design (cf. Gen 1:28).
The Book of Genesis provides us with certain foundations of Christian anthropology: the inalienable dignity of the human person, the roots and guarantee of which are found in God's design of creation; the constitutive social nature of human beings, the prototype of which is found in the original relationship between man and woman, the union of whom “constitutes the first form of communion between persons”38Second Vatican Ecumenical Council, Pastoral Constitution Gaudium et Spes, 12: AAS 58 (1966), 1034.; the meaning of human activity in the world, which is linked to the discovery and respect of the laws of nature that God has inscribed in the created universe, so that humanity may live in it and care for it in accordance with God's will. This vision of the human person, of society and of history is rooted in God and is ever more clearly seen when his plan of salvation becomes a reality.