See this online text:
- Encyclical “Lux Veritatis” on the Council of Ephesus, by Pope Pius XI, 25 December 1931. May be read online on this page at the EWTN Libraries (copyright 1999), at Papal Encyclicals Online, and at the Catholic News Agency; and available in .doc format on this page through Documenta Catholica Omnia.
On the Memorial of the Third Ecumenical Council at Ephesus in the Maronite church.
“[O]ur Lord Jesus Christ is true God and true man, perfect in his divinity and perfect in his humanity, consubstantial with the Father and consubstantial with us in all things but sin. His divinity and his humanity are united in one person, without confusion or change, without division or separation. In him has been preserved the difference of the natures of divinity and humanity, with all their properties, faculties and operations. But far from constituting “one and another”, the divinity and humanity are united in the person of the same and unique Son of God and Lord Jesus Christ, who is the object of a single adoration.” (Common Christological Declaration between the Catholic Church and the Assyrian Church of the East, 11 November 1994)