We must begin with ourselves: bishops and priests, who should not feel themselves superior to our brothers and sisters in the people of God. Pastoral… - Pope Francis

Some sixty years ago, Pope Pius XII, in a memorable address to anaesthesiologists and intensive care specialists, stated that there is no obligation to have recourse in all circumstances to every possible remedy and that, in some specific cases, it is permissible to refrain from their use ... The specific element of this criterion is that it considers “the result that can be expected, taking into account the state of the sick person and his or her physical and moral resources”. It thus makes possible a decision that is morally qualified as withdrawal of “overzealous treatment”.
Such a decision responsibly acknowledges the limitations of our mortality, once it becomes clear that opposition to it is futile. “Here one does not will to cause death; one’s inability to impede it is merely accepted” (Catechism of the Catholic Church, No. 2278). This difference of perspective restores humanity to the accompaniment of the dying, while not attempting to justify the suppression of the living. It is clear that not adopting, or else suspending, disproportionate measures, means avoiding overzealous treatment; from an ethical standpoint, it is completely different from euthanasia, which is always wrong, in that the intent of euthanasia is to end life and cause death.
The anguish associated with conditions that bring us to the threshold of human mortality, and the difficulty of the decision we have to make, may tempt us to step back from the patient. Yet this is where, more than anything else, we are called to show love and closeness, recognizing the limit that we all share and showing our solidarity. Let each of us give love in his or her own way—as a father, a mother, a son, a daughter, a brother or sister, a doctor or a nurse. But give it!

In our age of profound change, the Church is called to offer its unique contribution, by making visible the signs of the presence and closeness of God. And the Jubilee is a favorable time for us all, for in contemplating the Divine Mercy, which surpasses every human limitation and shines on the darkness of sin, we can become more convincing and effective witnesses.

It is difficult to make a general judgement about genetic modification (GM), whether vegetable or animal, medical or agricultural, since these vary greatly among themselves and call for specific considerations. The risks involved are not always due to the techniques used, but rather to their improper or excessive application. Genetic mutations, in fact, have often been, and continue to be, caused by nature itself. Nor are mutations caused by human intervention a modern phenomenon. The domestication of animals, the crossbreeding of species and other older and universally accepted practices can be mentioned as examples. We need but recall that scientific developments in GM cereals began with the observation of natural bacteria which spontaneously modified plant genomes. In nature, however, this process is slow and cannot be compared to the fast pace induced by contemporary technological advances, even when the latter build upon several centuries of scientific progress.