From Pope Benedict XVI’s encyclical Caritas in Veritate (2009):
A particularly crucial battleground in today’s cultural struggle between the supremacy of technology and human moral responsibility is the field of bioethics, where the very possibility of integral human development is radically called into question. In this most delicate and critical area, the fundamental question asserts itself force-fully: is man the product of his own labours or does he depend on God? Scientific discoveries in this field and the possibilities of technological intervention seem so advanced as to force a choice between two types of reasoning: reason open to transcendence or reason closed within immanence. We are presented with a clear either/ or. Yet the rationality of a self-centred use of technology proves to be irrational because it implies a decisive rejection of meaning and value. It is no coincidence that closing the door to transcendence brings one up short against a difficulty: how could being emerge from nothing, how could intelligence be born from chance?153 Faced with these dramatic questions, reason and faith can come to each other’s assistance. Only together will they save man. Entranced by an exclusive reliance on technology, reason without faith is doomed to flounder in an illusion of its own omnipotence. Faith without reason risks being cut off from everyday life.154
153 Cf. Benedict XVI, Address to the Participants in the Fourth National Congress of the Church in Italy, Verona, 19 October 2006; Id., Homily at Mass, Islinger Feld, Regensburg, 12 September 2006.
154 Cf. Congregation for the Doctrine of the Faith, Instruction on certain bioethical questions Dignitas Personae (8 September 2008): Acta Apostolicæ Sedis 100 (2008), 858-887.
— Caritas in Veritate 74