What is personhood?
Question 05023
Personhood is one of the most consequential questions in ethics, because the answer determines who is protected, who is excluded, and on what basis. It is also a question where the biblical account and the dominant contemporary accounts diverge in ways that have immediate practical consequences. The disagreement is not merely about timing or biology; it is about what kind of thing personhood is.
Two Definitions
The approach that dominates much contemporary bioethics and legal philosophy defines personhood in terms of function: a being is a person when it possesses certain capacities, whether self-awareness, sentience, the ability to experience pleasure or pain, rationality, or some combination of these. The appeal of this approach is that it seems to tie personhood to the features most obviously associated with what we mean by “being a person.” Its difficulty is that it immediately excludes, or assigns diminished status to, every human being who lacks the relevant capacities: newborn infants, cognitively disabled adults, people in comas, those in advanced stages of dementia. If the logic is followed consistently, none of these groups fully qualifies as persons on a functional account, which has implications that most people find deeply troubling but which follow directly from the premise.
The biblical definition is ontological rather than functional. It locates personhood not in what a being can currently do but in what it is. A human being is a person because of its nature as an image-bearer of God, not because of its present capacity to demonstrate any particular attribute. Personhood on this account is not a developmental threshold to be crossed, a capacity to be acquired, or a status to be conferred. It belongs to the human being as such.
When Does Personhood Begin?
If personhood is ontological and grounded in the image of God, then it begins when the human being begins. And Scripture consistently places that beginning at conception rather than at any subsequent point in development.
Psalm 139:13-16 is the most sustained biblical meditation on this. David reflects on God’s attentive, personal formation of him in the womb: “For you formed my inward parts; you knitted me together in my mother’s womb.” The language throughout the passage treats the subject of God’s forming work as a person, not a pre-personal process that will eventually produce one. God’s eyes saw David’s “unformed substance” (verse 16, the Hebrew golem referring to the embryonic form) and his days were already written when “as yet there was none of them.” The knowledge and care of God were present from the very beginning of David’s existence.
Jeremiah 1:5 goes further still: “Before I formed you in the womb I knew you, and before you were born I consecrated you; I appointed you a prophet to the nations.” The divine knowing and commissioning precede both birth and formation. God is addressing Jeremiah as a person, with a name and a vocation, from before his conception. And in Luke 1:41-44, when Mary greets Elizabeth, the infant John in the womb leaps, and Elizabeth, filled with the Holy Spirit, immediately connects this response to John’s awareness of the presence of Jesus. The text presents what happens not as biological reflex but as the recognition one person extends to another.
The picture that emerges across these passages is of a continuous story about one person from conception onward. Scripture does not identify a biological or developmental event during gestation that marks the arrival of personhood at some point after fertilisation. The person God knows, forms, calls, and commissions is present from the beginning of that person’s existence.
What This Changes
A biblical understanding of personhood reshapes the framework for several practical questions. It removes the possibility of treating the unborn child as a pre-personal entity whose existence can be ended without moral consequence. It prevents the progressive diminishment of personhood that tends to follow from functional accounts, where those who lack certain capacities are treated as less than fully human. It also shapes how we approach end-of-life questions, the treatment of those with profound intellectual disabilities, and the general posture of society toward those who cannot advocate for themselves.
None of this means that every question in medical ethics has a simple answer. There are genuinely difficult cases where competing obligations require careful thought. But those difficult cases are navigated against a fixed background: every human being, at every stage of development, in every condition, bears the image of God and is therefore a person. That is not a negotiable starting point; it is the one from which everything else must be worked out.
So, now what?
The claim that personhood is grounded in the image of God rather than in the possession of certain capacities is not merely an abstract theological position. It is a commitment that carries weight in every context where human beings are evaluated, ranked, or treated as expendable. If the church holds this conviction clearly, it will speak with a distinctive voice in a culture that increasingly links human worth to usefulness, productivity, or the subjective valuations of others. The person whose existence is inconvenient, whose capacities are limited, or whose life is at its most vulnerable is not thereby less of a person. They bear the same image as those who are most powerful, most capable, and most celebrated. And that image belongs to God.
“For you formed my inward parts; you knitted me together in my mother’s womb. I praise you, for I am fearfully and wonderfully made.” Psalm 139:13-14