God the Son’s Assumption of Human Nature: A Pneumatological Reexamination of John Calvin on Christ’s Unfallen yet Mortal Humanity

This article critically examines the theological debate concerning whether Christ assumed a fallen or unfallen human nature. I argue that the most helpful way to address this controversy is by determining which position best affirms Christ’s ongoing engagement with the fallenness of creation. My thesis is that Christ’s vicarious humanity is grounded not in the enhypostatic assumption of fallenness into his person, but in his mortal vulnerability – his genuine openness to and confrontation with sin, suffering, and death as they afflict humanity. To develop this claim, the article turns to John Calvin as a constructive resource. For Calvin, Christ’s humanity was unfallen in its purity, yet his birth through Mary placed him fully within a fallen order, exposing him to temptation and hostile powers. From birth to death, his sinlessness was preserved dynamically through the sanctifying power of the Holy Spirit. This pneumatological insight warrants further theological exploration.