Jesus Christ
Jesus Christ is the eternal Son and Word of God incarnate: one divine hypostasis in two complete natures, divine and human, without confusion, change, division, or separation. The same Person acts and is spoken of according to either nature.
Why it matters
If Christ is not truly God, He cannot unite humanity to God; if He is not fully human, human nature is not fully healed.
Historical context
Ephesus (431) defended the unity of Christ and Theotokos; Chalcedon (451) confessed one and the same Christ in two natures; Constantinople III (680–681) defended two natural wills and operations.
Pastoral note
This module supports parish catechesis; it does not replace the guidance of the priest or catechist responsible for a person's reception into the Church. Local disciplines and preparation practices belong to the parish and bishop.
Memory hook
One WHO—the Son—in two complete WHATS—divine and human.
Learning objectives
- Identify the Son as the one acting subject of the Incarnation.
- Explain two natures, two natural wills, and two natural operations.
- Understand why Mary is called Theotokos as a confession about Christ.
Essentials
- The Word did not merely inhabit an independent human person.
- Christ possesses a complete human mind, soul, body, will, and operation.
- The natures remain distinct while united in the one Son.
- Divine and human predicates belong to the same Person according to different natures.
Common questions
- Did God suffer and die?
- Why call Mary Mother of God?
- Could Christ have a human will different from the divine will?
- What do the four Chalcedonian adverbs protect?
Practice and discussion
- Use the Christology Lab to trace each predicate to the appropriate nature.
- Read one Gospel while asking who acts and according to which nature.
- Discuss Theotokos before approaching later questions about Marian devotion.
Fathers and witnesses
- St. Athanasius — On the Incarnation
- St. Gregory the Theologian — Epistle 101
- St. Cyril of Alexandria — letters against Nestorius
- St. Maximus the Confessor — defense of two wills
Scripture
- John 1:1-18 — The divine Word becomes flesh without ceasing to be God.
- Philippians 2:5-11 — The one who is in God's form assumes the form of a servant and is exalted.
- Hebrews 2:14-18; 4:14-16 — Christ truly shares humanity and is a compassionate High Priest.
- Luke 1:35, 43 — The child born of Mary is holy, Son of God, and confessed as Lord.
Primary sources
The Council of Chalcedon defines Christ as:
Chalcedon's definition confesses Christ in two natures without confusing or dividing them.
in two natures, unconfusedly, immutably, indivisibly, inseparably [united]
Passage context and translation
The definition confesses one and the same Christ in two natures while preserving both their distinction and their union in one person. Oriental Orthodox churches do not receive Chalcedon, even though later dialogues have identified significant shared Christological convictions.
Before the excerpt
This one and the same Jesus Christ, the only-begotten Son [of God] must be confessed to be
After the excerpt
and that without the distinction of natures being taken away by such union
Gregory the Theologian writes:
Gregory links Christ's assumption of complete humanity to its healing.
For that which He has not assumed He has not healed; but that which is united to His Godhead is also saved.
Passage context and translation
Gregory rejects Apollinarianism by insisting that the Word assumed the fullness of human nature, including a human mind.
Before the excerpt
If anyone has put his trust in Him as a Man without a human mind, he is really bereft of mind, and quite unworthy of salvation.
After the excerpt
If only half Adam fell, then that which Christ assumes and saves may be half also; but if the whole of his nature fell, it must be united to the whole nature of Him that was begotten, and so be saved as a whole.