[Bioethical arguments in Joseph Ratzinger's thinking].

In the dense theological thought of Joseph Ratzinger before his election as pope, we find fundamental contributions to contemporary bioethics. Starting from the assumption of the close relationship between faith and science he incorporates a necessary theological dimension in the bioethical dialogue that illuminates and clarifies the answers to the real questions raised in bioethical actions. On the one hand, there is the question of the origin of man that is understood as God's creation as opposed to a purely biological origin to which a modern pseudoscientific stance wants to confine it. On the other hand, there is the question about man's identity, which is understood as the image of God, from which stems the inviolable dignity and sacredness of human life, overcoming scientistic materialism. Finally, we find the question of how to treat the ″other″, even the embryo, as a result of its lofty dignity, analyzing the ethical and legal consequences that exude from their nature and are summarized in the duty to protect and respect the other which the law should protect against the abuse of those who are stronger.