I have chosen to focus on Gregory of Nyssa’s approach to science, for this conference, because, among all the religious thinkers I know, he is one of the very richest theologians and mystics and, at the same time, the one most interested in science, with a positive attitude towards it. Indeed, Gregory († 394ca.) was not only one of the most outstanding theologians in Christian Patristics – a direct heir of the great philosopher, theologian and exegete Origen of Alexandria – but he was also deeply interested in science. These two aspects, theology and science, are not opposed to one another in Gregory’s thought, since both proceed from the same logos. The logos, in its most perfect form, is Christ, the Logos of God, whose full expression is ...