Every term
defined

Deification — the participation of the human person in the divine life by grace.

Person — used to distinguish the three Persons of the Trinity while affirming one essence.

Essence or substance — what God is in himself, shared equally by Father, Son, and Spirit.

Word or Reason — the second Person of the Trinity, the Son of God, who became flesh.

God-bearer — the title given to the Virgin Mary, affirming the full divinity of her Son.

Of the same essence — the word defined at Nicaea to affirm the full divinity of the Son.

Divine energy — the uncreated self-manifestation of God in which creatures genuinely participate.

Latin: "and from the Son." The Western addition to the Creed, rejected by the Orthodox Church.

The doctrine that Christ's human nature subsists in the hypostasis of the divine Logos.

Of both divine and human nature — used to describe the single activity of the incarnate Christ.

Economy — God's plan of salvation worked out in history; also the Incarnation itself.

Negative theology — knowing God by what He is not, since His essence transcends all concepts.

Irenaeus's teaching that Christ re-runs and redeems the entire course of human history.

Stillness or silence — the interior disposition proper to prayer and contemplative life.

God-man — used to describe the unique Person of Jesus Christ, fully divine and fully human.

Mutual indwelling — the interpenetration of the three divine Persons in one another.

Self-emptying — from Phil 2:7, used to describe the Son's humble assumption of human nature.

The liturgical cloth containing relics, on which the Eucharist is celebrated.