42. To defend and promote life, to show reverence and love for it, is a task which God entrusts to every man, calling him as his living image to share in his own lordship over the world: "God blessed them, and God said to them, ?Be fruitful and multiply, and fill the earth and subdue it; and have dominion over the fish of the sea and over the birds of the air and over every living thing that moves upon the earth' " (Gen 1:28).
The biblical text clearly shows the breadth and depth of the lordship which God bestows on man. It is a matter first of all of dominion over the earth and over every living creature, as the Book of Wisdom makes clear: "O God of my fathers and Lord of mercy ... by your wisdom you have formed man, to have dominion over the creatures you have made, and rule the world in holiness and righteousness" (Wis 9:1, 2-3). The Psalmist too extols the dominion given to man as a sign of glory and honour from his Creator: "You have given him dominion over the works of your hands; you have put all things under his feet, all sheep and oxen, and also the beasts of the field, the birds of the air, and the fish of the sea, whatever passes along the paths of the sea" (Ps 8:6-8).
As one called to till and look after the garden of the world (cf. Gen 2:15), man has a specific responsibility towards the environment in which he lives, towards the creation which God has put at the service of his personal dignity, of his life, not only for the present but also for future generations. It is the ecological question-ranging from the preservation of the natural habitats of the different species of animals and of other forms of life to "human ecology" properly speaking - which finds in the Bible clear and strong ethical direction, leading to a solution which respects the great good of life, of every life. In fact, "the do- minion granted to man by the Creator is not an absolute power, nor can one speak of a freedom to ?use and misuse', or to dispose of things as one pleases. The limitation imposed from the beginning by the Creator himself and expressed symbolically by the prohibition not to ?eat of the fruit of the tree' (cf. Gen 2:16-17) shows clearly enough that, when it comes to the natural world, we are subject not only to biological laws but also to moral ones, which cannot be violated with impunity".
43. A certain sharing by man in God's lordship is also evident in the specific responsibility which he is given for human life as such. It is a responsibility which reaches its highest point in the giving of life through procreation by man and woman in marriage. As the Second Vatican Council teaches: "God himself who said, ?It is not good for man to be alone' (Gen 2:18) and ?who made man from the beginning male and female' (Mt 19:4), wished to share with man a certain special participation in his own creative work. Thus he blessed male and female saying: ?Increase and multiply' (Gen 1:28).
By speaking of "a certain special participation" of man and woman in the "creative work" of God, the Council wishes to point out that having a child is an event which is deeply human and full of religious meaning, insofar as it involves both the spouses, who form "one flesh" (Gen 2:24), and God who makes himself present. As I wrote in my Letter to Families: "When a new person is born of the conjugal union of the two, he brings with him into the world a particular image and likeness of God himself: the genealogy of the person is inscribed in the very biology of generation. In affirming that the spouses, as parents, cooperate with God the Creator in conceiving and giving birth to a new human being, we are not speaking merely with reference to the laws of biology. Instead, we wish to emphasize that God himself is present in human fatherhood and motherhood quite differently than he is present in all other instances of begetting ?on earth'. Indeed, God alone is the source of that ?image and likeness' which is proper to the human being, as it was received at Creation. Begetting is the continuation of Creation".
This is what the Bible teaches in direct and eloquent language when it reports the joyful cry of the first woman, "the mother of all the living" (Gen 3:20). Aware that God has intervened, Eve exclaims: "I have begotten a man with the help of the Lord" (Gen 4:1). In procreation therefore, through the communication of life from parents to child, God's own image and likeness is transmitted, thanks to the creation of the immortal soul. The beginning of the "book of the genealogy of Adam" expresses it in this way: "When God created man, he made him in the likeness of God. Male and female he created them, and he blessed them and called them man when they were created. When Adam had lived a hundred and thirty years, he became the father of a son in his own likeness, after his image, and named him Seth" (Gen 5:1-3). It is precisely in their role as co-workers with God who transmits his image to the new creature that we see the greatness of couples who are ready "to cooperate with the love of the Creator and the Saviour, who through them will enlarge and enrich his own family day by day". This is why the Bishop Amphilochius extolled "holy matrimony, chosen and elevated above all other earthly gifts" as "the begetter of humanity, the creator of images of God".
Thus, a man and woman joined in matrimony become partners in a divine undertaking: through the act of procreation, God's gift is accepted and a new life opens to the future.
But over and above the specific mission of parents, the task of accepting and serving life involves everyone; and this task must be fulfilled above all towards life when it is at its weakest. It is Christ himself who reminds us of this when he asks to be loved and served in his brothers and sisters who are suffering in any way: the hungry, the thirsty, the foreigner, the naked, the sick, the impris- oned ... Whatever is done to each of them is done to Christ himself (cf. Mt 25:31-46).
-From John Paul II's Encyclical Letter, Evangelium Vitae.