Union and Distinction in the Thought of St Maximus the Confessor presents the writings of a key figure in Byzantine theology in the light of the themes of unity and diversity. The principle of simultaneous union and distinction forms the core of Maximus' thought, pervading every area of his theology. It can be summarized as: Things united remain distinct and without confusion in an inseparable union. As Melchisedec Toronen shows, this master theme also resonates in contemporary theological and philosophical discussions.