Johannes Zachhuber holds a doctorate from the University of Oxford and a Habilitation from Humboldt University, Berlin. After completing his DPhil in 1998, he taught at Humboldt University in Berlin until 2005 when he joined the University of Oxford and was appointed Fellow of Theology at Trinity College, Oxford. In 2014, he was named Professor of Historical and Systematic Theology at the University of Oxford. His research ranges across the history of Christian theology with a special emphasis on late antiquity and the nineteenth century. His most recent monograph is The Rise of Christian Theology and the End of Ancient Metaphysics (2020).Anna Marmodoro holds the Chair of Metaphysics in the Department of Philosophy at Durham University and she is concomitantly an Associate Member of the Faculty of Philosophy of the University of Oxford. She specializes in two main research areas: on the one hand, metaphysics, and on the other, ancient, late antique, and medieval philosophy. She has also strong research interests in the philosophy of science and the philosophy of religion. Anna has published monographs, edited books, and journal articles in all these areas. Her latest monographs are Forms and Structure in Plato's Metaphysics (2021), and Properties in Ancient Metaphysics (2023).

• Johannes Zachhuber: Introduction Greek Text with English translation by Andrew Radde-Gallwitz: Gregory of Nyssa: In Hexaemeron Benjamin Gleede: 'Simultaneous Creation' in Gregory of Nyssa's In Hexaemeron Gretchen Reydams-Schils: God in the World: Akolouthia and Stoicism in Gregory of Nyssa's In Hexaemeron Andrew Radde-Gallwitz: Particles, Powers, and Natural Kinds in Gregory of Nyssa's 'Empedoclean' Cosmogony Jonathan Greig: The 'Bundle Theory' in Gregory of Nyssa's In Hexaemeron Anna Marmodoro: Gregory of Nyssa's 'Stripping Away' Thought Experiment in the In Hexaemeron Isidoros C. Katsos: An Apology for the Apology: Gregory of Nyssa's Philosophy of Light and Why It Matters Johannes Zachhuber: 'Logos' in Gregory of Nyssa's In Hexaemeron Appendix