When man, who had been created "in the image of God.... male and female", hears the words: "Be fruitful and multiply, and fill the earth and subdue it", even though these words do not refer directly and explicitly to work, beyond any doubt they indirectly indicate it as an activity for man to carry out in the world. Indeed, they show its very deepest essence. Man is the image of God partly through the mandate received from his Creator to subdue, to dominate, the earth. In carrying out this mandate, man, every human being, reflects the very action of the Creator of the universe. This universality and, at the same time, this multiplicity of the process of "subduing the earth" throw light upon human work, because man's dominion over the earth is achieved in and by means of work. There thus emerges the meaning of work in an objective sense, which finds expression in the various epochs of culture and civilization. Man dominates the earth by the very fact of domesticating animals, rearing them and obtaining from them the food and clothing he needs, and by the fact of being able to extract various natural resources from the earth and the seas. But man "subdues the earth" much more when he begins to cultivate it and then to transform its products, adapting them to his own use. Thus agriculture constitutes through human work a primary field of economic activity and an indispensable factor of production. Industry in its turn will always consist in linking the earth's riches-whether nature's living resources, or the products of agriculture, or the mineral or chemical resources-with man's work, whether physical or intellectual. This is also in a sense true in the sphere of what are called service industries, and also in the sphere of research, pure or applied. (Papal Encyclical, Laborem Exercens: On Human Work, 14 September 1981).
At the root of the senseless destruction of the natural environment lies an anthropological error, which unfortunately is widespread in our day. Man, who discovers his capacity to transform and in a certain sense create the world through his own work, forgets that this is always based on God's prior and original gift of the things that are. Man thinks that he can make arbitrary use of the earth, subjecting it without restraint to his will, as though it did not have its own requisites and a prior God-given purpose, which man can indeed develop but must not betray. Instead of carrying out his role as a co-operator with God in the work of creation, man sets himself up in place of God and thus ends up provoking a rebellion on the part of nature, which is more tyrannized than governed by him. (Papal Encyclical, Centesimus Annus, 1 May 1991).