Hypostatic union

Icon of Christ

Hypostatic union (from the Greek: ὑπόστασις, {"[h]upostasis"}, "hypostasis", sediment, foundation, substance, or subsistence) is a technical term in Christian theology employed in mainstream Christology to describe the union of Christ's humanity and divinity in one hypostasis.

The First Council of Ephesus recognised this doctrine and affirmed its importance, stating that the humanity and divinity of Christ are made one according to nature and hypostasis in the Logos.

The Use of hypostasis

Main article: Hypostasis (philosophy)

Hypostasis had come into use as a technical term prior to the Christological debates of the late fourth and fifth centuries. Before there were Christians, the word was used in Greek philosophy, primarily in Stoicism. Hypostasis had some use in the New Testament that reflect the later, technical understanding of the word; especially Hebrews 1:3. Although it can be rendered literally as "substance" this has been a cause of some confusion so it is now often translated "subsistence". It denotes an actual, concrete existence, in contrast with abstract categories such as Platonic ideals.

The First Council of Nicaea declared that the Father and the Son are of the same substance and are co-eternal. This belief was expressed in the Nicene Creed.

Through history

Apollinaris of Laodicea was the first to use the term hypostasis in trying to understand the Incarnation. Apollinaris described the union of the divine and human in Christ as being of a single nature and having a single essence - a single hypostasis.

The Nestorian Theodore of Mopsuestia went in the other direction, arguing that in Christ there were two natures (dyophysite) (human and divine) and two hypostases (in the sense of "essence" or "person") that co-existed.

The Chalcedonian Creed agreed with Theodore that there were two natures in the Incarnation. However, the Council of Chalcedon also insisted that hypostasis be used as it was in the Trinitarian definition: to indicate the person and not the nature as with Apollinarius.

Thus, the Council declared that in Christ there are two natures; each retaining its own properties, and together united in one subsistence and in one single person (εἰς ἓν πρόσωπον καὶ μίαν ὑπόστασιν, eis hen prosopon kai mian hupostasin)

As the precise nature of this union is held to defy finite human comprehension, the hypostatic union is also referred to by the alternative term "mystical union."

The Oriental Orthodox Churches, having rejected the Chalcedonian Creed, were known as Monophysites because they would only accept a definition that characterized the incarnate Son as having one nature. The Chalcedonian "in two natures" formula was seen as derived from and akin to a Nestorian Christology. Contrariwise, the Chalcedonians saw the Oriental Orthodox as tending towards Eutychian Monophysitism. However, the Oriental Orthodox have in modern ecumenical dialogue specified that they have never believed in the doctrines of Eutyches, that they have always affirmed that Christ's humanity is consubstantial with our own, and they they thus prefer the term "Miaphysite" to refer to themselves (a reference to Cyrillian Christology, which used the phrase "mia physis tou theou logou sesarkomene").

In recent times, leaders from the Eastern Orthodox and Oriental Orthodox Churches have signed joint statements in an attempt to work towards reunification.

References

 This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). Catholic Encyclopedia. New York: Robert Appleton Company. {{cite encyclopedia}}: Missing or empty |title= (help)