Martin Luther

On the Divinity and Humanity of Christ

Chapter 1

Argument: A human person is one thing, a divine person another. But in Christ there are both divinity and humanity. Therefore there are two persons in Christ.

Response: This is the fallacy of composition and division. In the major premise you divide the human nature and the divine; in the minor premise you join them. This is a philosophical solution; but we are speaking theologically. I deny the consequence, for this reason, that in Christ the humanity and the divinity constitute one person. But these two natures are distinct in theology, with respect, that is, to the natures, but not with respect to [secundum] the person. For then they are undivided [indistinctae], but two distinct natures, yet belonging to an undivided person [indistinctae personae]. There are not two distinct persons, but what is distinct is undivided [sed sunt distinctae indistinctae], that is, there are distinct natures, but an undivided person.