#Theosis

Jesus answered them, “Is it not written in your law, ‘I said, “You are gods” ’?”

— Gospel of John, Gospel of John, 10:34

For the Word of God became man that He might deify us, and manifested Himself in a body that we might obtain knowledge of the unseen Father, and endured the insult of men that we might inherit immortality…

— St Athanasius, the Apostolic, On the Incarnation, 54:3

Just as bright, transparent bodies, when rays of light fall on them, themselves become radiant and shed forth a fresh brightness from themselves, so Spirit-bearing souls, when they are illuminated by the Holy Spirit, themselves become wholly spiritual… likeness to God, and the highest of all desires: to become God!

— St Basil, the Great, On the Holy Spirit, 9 (23)

The goal of Orthodox doctrines is to lead us to life in the Father, with the presence of the living Christ in us, by the power of the Holy Spirit. This is realized through the holy sacramental life of the Church, so that we may transcend our corrupt human nature, and rise and attain true life, and be deified, that is, partake of the divine nature…

— Metropolitan Nicholas Antoniou, Metropolitan of Tanta (Greek Orthodox Patriarchate of Alexandria), The Doctrine of Theosis in the Orthodox Church, p. 1

He took our body, and gave us His Holy Spirit, and made us one with Him, because of His goodness. He took what is ours, and gave us what is His; we praise Him and glorify Him, and exalt Him ever higher.

— The Theotokia (Coptic Psalmody), Theotokia of Friday, Second Piece

You reconciled the earthly with the heavenly, and made the two one, and fulfilled the dispensation in the flesh. And at Your ascension into the heavens bodily, having filled all things with Your Godhead, You said to Your holy disciples and apostles: “My peace I give to you, My peace I leave with you.” This also now, grant it to us, O our Lord.

— Coptic Liturgy of St Gregory the Theologian, Liturgy of St. Gregory, Prayer of Reconciliation, “O You who are”

Theosis is the process by which man is united to God from glory to glory. The righteous will be deified on the last day, but this process must begin from now, through love for God and keeping His commandments…

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…from the first centuries the differences appeared between the East, whose theology rests on the experience of being, asceticism, experience and the liturgy, and the Christian West, whose theology, just like its culture, rests on rationalism and legal concepts…

— Fr. Dr. Athanasius Ishaq Hanin, Priest and theological writer, Partakers of the Divine Nature