If you ask a conservative Christian how many wills Christ has had since the incarnation, he will likely respond, “one will!” This sounds good, but is it true? Orthodox Christology teaches that Christ, the Divine Person, has eternally existed. Each person has a specific nature, which can be described as a “complex of attributes.”1 A nature is, if you will, the constellation or package of attributes that color and shape you as a “person.” Personhood entails possession of this host of attributes, no matter what particular shape they take in your own life.
But, in the incarnation, something changed. Now, Christ’s divine complex of divine attributes (his divine nature) was coupled with a human constellation of human attributes (his human nature). Where does the idea of a volitional “will” fit into this picture? If you assume a “will” is an essential part of a person’s nature, then (logically) it follows that Christ must have two wills; the human and the divine.
This is the conundrum the Sixth Ecumenical Council met to discuss, and it was at this council that the doctrine of monothelitism (one will in the incarnate Christ) was condemned. Below is the full text of the decree of this council,2 so you can read the matter for yourself: