Martin Luther

On the Divinity and Humanity of Christ

Chapter 15

Argument: Moses says, "The Lord your God is one God." Therefore Christ cannot be true God.

Response: What Moses says, that God is one, in no way contradicts us. For we too say that there is one God, and not many, but that unity of substance and essence has three distinct persons, as the nature[s] of Christ are united in one person. When therefore it is said that "the divinity died," then it is implied that the Father too and the Holy Spirit have died. But this is not true, for only one person of the divinity, the Son, is born, dies, and suffers, etc. Therefore the divine nature, when it is take for a person, was born, suffered, died, etc., and this is true. We must therefore make a distinction. If you understand by "divine nature" the whole divinity or the unity, then the assertion is false, because Christ alone is not the whole Trinity, but only one person of the Trinity. Therefore there is only one God. Here we preach, insofar as it is possible, that these three persons are one God and one essence. But we believe that these things are incomprehensible; if they could be comprehended, there would be no need to believe them.