The covenant of redemption is the foundation of the economy of salvation and of the Incarnation and it is this, therefore, that should be the starting-point of any discussion of the person of Jesus Christ in Owen's theology. In debate with Richard Baxter, Owen emphasizes that Christ's death is a sacrifice with salvific value only because it is offered in the context of the covenantal arrangement between Father and Son. The basic elements of Owen’s position on the extent of the atonement are laid out in the 1642 work, A Display of Arminianism. Owen’s elaboration of the Trinitarian structure of the covenant of redemption continued throughout his career, and receives perhaps its most sophisticated expression in his Pneumatologia, where he employs some of the most sophisticated concepts in patristic Christology particularly to expand upon the role of the Holy Spirit relative to the Incarnation.