Christological Union
The aim of Chapter 4 is to explain how Irenaeus conceives of the union between the divine Word-Son and humanity in the person of Jesus Christ, thereby preparing the way for a study of the work of Christ in Chapter 5. To that end, this chapter contends that Irenaeus uses Stoic mixture theory to conceptualize the Christological union, including the relationship between the human and divine in the experiences and activities of Christ. This chapter demonstrates that Irenaeus used Stoic mixture theory to explain the interaction of the soul and body in human beings, the salvific joining of human beings to the Word of God, and the union of and interaction between the divine and human in Jesus. It concludes by highlighting the connection Irenaeus draws between the person of Christ and the mixed cup of the Eucharist.