Gregory illustrates the complex reception of Chalcedon in the West in the way he dealt with the Istrian Schism caused by the Fifth Ecumenical Council of 553. At issue was whether Chalcedon's decisions in their entirety or its doctrinal statements alone were inviolable. Gregory strongly urged the latter, influenced by initial papal support for the Fifth Council, his conviction that only those within the church would be saved and pastoral anxiety about the imminence of the eschaton. However, his literary legacy also demonstrates his commitment to the soteriological significance of the Chalcedonian definition of the two natures of Christ.