Imago Dei

The phrase comes from Genesis 1:26–27, where God says "Let us make man in our image, after our likeness" and then creates humans "male and female." Christian, Jewish, and Islamic traditions have all built substantial ethical and anthropological conclusions on this verse, but they disagree sharply about what the image actually consists in.

The oldest view is the substantive interpretation: the image of God is some capacity humans possess and other animals lack, usually identified with rationality, moral conscience, or the capacity for free choice. Thomas Aquinas held a version of this, locating the image in the rational soul. A second view is relational: the image is the capacity to stand in relationships of love, particularly with God and with other humans. Karl Barth argued for this reading. A third view, prominent in twentieth-century Protestant theology, is functional: the image refers to the role humans are given in Genesis as stewards of creation, not to any intrinsic property.

For secular readers, imago Dei is worth knowing because it is one of the foundations of Christian claims about human rights and inherent dignity. When Christian bioethicists argue against euthanasia or embryo research by invoking "the image of God," they are drawing on this doctrine. The secular alternatives — Kantian dignity, evolutionary ethics, rights-based frameworks — try to reach similar conclusions without the theological starting point, with varying degrees of success.

The doctrine is also the usual answer Christians give to the question of what grounds objective morality in a universe otherwise governed by impersonal physics. The claim that humans have a special moral status because they image the Creator is doing a lot of work, and every part of it is contested — by other theologians as much as by secular philosophers.