Dissertation

Initial Suggestion for Dissertation Topics

Qurʾānic Engagement with Christian Doctrines: A Study of Trinity, Incarnation, and the Divine Sonship of Jesus in Classical and Contemporary Islamic Theology
O People of the Book! Do not go to extremes regarding your faith; say nothing about Allah except the truth. The Messiah, Jesus, son of Mary, was no more than a messenger of Allah and the fulfilment of His Word through Mary and a spirit ˹created by a command˺ from Him. So believe in Allah and His messengers and do not say, “Trinity.” Stop!—for your own good. Allah is only One God. Glory be to Him! He is far above having a son! To Him belongs whatever is in the heavens and whatever is on the earth. And Allah is sufficient as a Trustee of Affairs.
www.quran.com/an-nisa/171
Qur’an 4:171
Those who say, “Allah is the Messiah, son of Mary,” have certainly fallen into disbelief. The Messiah ˹himself˺ said, “O Children of Israel! Worship Allah—my Lord and your Lord.” Whoever associates others with Allah ˹in worship˺ will surely be forbidden Paradise by Allah. Their home will be the Fire. And the wrongdoers will have no helpers.
Those who say, “Allah is one in a Trinity,” have certainly fallen into disbelief. There is only One God. If they do not stop saying this, those who disbelieve among them will be afflicted with a painful punishment.
Will they not turn to Allah in repentance and seek His forgiveness? And Allah is All-Forgiving, Most Merciful.
The Messiah, son of Mary, was no more than a messenger. ˹Many˺ messengers had ˹come and˺ gone before him. His mother was a woman of truth. They both ate food. See how We make the signs clear to them, yet see how they are deluded ˹from the truth˺!
www.quran.com/al-maidah/72-75
Qur’an 5:72-75
And ˹on Judgment Day˺ Allah will say, “O Jesus, son of Mary! Did you ever ask the people to worship you and your mother as gods besides Allah?” He will answer, “Glory be to You! How could I ever say what I had no right to say? If I had said such a thing, you would have certainly known it. You know what is ˹hidden˺ within me, but I do not know what is within You. Indeed, You ˹alone˺ are the Knower of all unseen.
https://quran.com/al-maidah/116
Qur’an 5:116
The Jews say, “Ezra is the son of Allah,” while the Christians say, “The Messiah is the son of Allah.” Such are their baseless assertions, only parroting the words of earlier disbelievers. May Allah condemn them! How can they be deluded ˹from the truth˺?
https://quran.com/at-tawbah/30
Qur’an 9:30
Say, ˹O Prophet,˺ “He is Allah—One ˹and Indivisible˺;
Allah—the Sustainer ˹needed by all˺.
He has never had offspring, nor was He born. — Dr. Mustafa Khattab, The Clear Quran
And there is none comparable to Him.”
https://quran.com/al-ikhlas
Qur’an 112

Major Milestones (historical stages) through which mainstream Christian doctrines about God, Jesus, the Trinity, the Holy Spirit, Mary, and Christ’s two natures were formally articulated, the most important period is roughly the 2nd–8th centuries, especially the first seven ecumenical councils.

A useful timeline is:

c. 2nd–4th c. [Old Roman Symbol / Apostles’ Creed tradition] Basic baptismal confession

Father, Jesus Christ, Holy Spirit, resurrection, etc. The Apostles’ Creed developed from early Western baptismal formulas rather than being composed at a single council.

325 [Council of Nicaea I] Who is Jesus in relation to God the Father? Arius and the Arian controversy.

Declared the Son “begotten, not made” and homoousios” (“of the same substance/consubstantial”) with the Father. This was the foundation of the Nicene Creed.

381 [Council of Constantinople I] Divinity/status of the Holy Spirit; continuing Trinitarian disputes

Expanded/confirmed Nicene theology and explicitly confessed the Holy Spirit as “Lord and giver of life,” worshipped and glorified with Father and Son. This gives us what is commonly called the Niceno-Constantinopolitan Creed.

431 [Council of Ephesus] How Jesus’ humanity and divinity relate; Nestorian controversy

Affirmed the unity of Christ’s person and defended the title Theotokos (“God-bearer/Mother of God”) for Mary in relation to Christology.

451 [Council of Chalcedon] How can Jesus be divine and human?

Defined Christ as one person/hypostasis in two natures, divine and human, without confusion, change, division, or separation.

553 [Constantinople II] Interpretation of Chalcedon and disputes associated with Nestorianism

Reaffirmed Chalcedonian Christology while emphasizing the unity of Christ.

680–681 [Constantinople III] Did Christ have one will or two?

Affirmed two wills and two operations, divine and human, corresponding to Christ’s two natures.

787 [Nicaea II] Icons/images

Defended the veneration of icons, while distinguishing veneration from the worship due to God.

c. 5th–6th c. [Athanasian Creed (Quicumque vult)] Trinity and Incarnation

Very explicit Western formulation: one God in three persons, with the persons distinct but sharing one divinity.

6th–11th c. [Filioque controversy] From whom does the Holy Spirit proceed?

Western Christianity added “and the Son” (filioque) to the Creed; Eastern Christianity retained “proceeds from the Father.” The addition was not part of the original 381 text.

1054 [East–West Schism] Papal authority, Filioque, ecclesiology and other disputes

Formalized the division between what became the Roman Catholic and Eastern Orthodox communions.

1517 onward [Protestant Reformation] Authority, justification, sacraments, Church structure, etc.

Protestant confessions emerged, while the major Reformation traditions generally retained the ancient Trinitarian and Christological doctrines associated with Nicaea and Chalcedon.

The four councils most important for your comparative-religion study

For studying the historical development of the Christian understanding of Jesus and the Trinity, I would concentrate especially on:

1. Nicaea — 325: What is the Son?
The central controversy involved Arius, who did not regard the Son as eternal and divine in exactly the same sense as the Father. Nicaea adopted the Greek term ὁμοούσιος (homoousios), declaring the Son to be of the same substance/essence as the Father. Importantly for historical study, homoousios itself is not biblical vocabulary; the council employed philosophical/theological terminology to clarify what it understood Scripture to teach.

2. Constantinople — 381: What about the Holy Spirit?
The Nicene position was reaffirmed, and the doctrine concerning the Holy Spirit became considerably more explicit. Thus the mature formulation became unmistakably Trinitarian: Father, Son, and Holy Spirit.

3. Ephesus — 431: Is Christ one person?
The controversy associated particularly with Nestorius and Cyril of Alexandria concerned how Christ’s divinity and humanity should be understood together. The title Theotokos became especially important because the debate about Mary was fundamentally a debate about Christology: who was the person born from Mary?

4. Chalcedon — 451: How is Jesus both God and man?
The Chalcedonian Definition taught that the same Jesus Christ is fully divine and fully human, existing in two natures united in one person/hypostasis.

So you can remember the development very simply:

  • 325 Nicaea: The Son’s divinity
  • 381 Constantinople: The Holy Spirit / mature Trinitarian formulation
  • 431 Ephesus: Unity of Christ’s person / Theotokos
  • 451 Chalcedon: Christ’s two natures
  • 553 Constantinople II: Clarification of Chalcedon
  • 680–681 Constantinople III: Christ’s two wills
  • 787 Nicaea II: Icons

This chronology is particularly useful for Islamic Studies and comparative religion, because it allows you to distinguish between New Testament texts, pre-Nicene Christian theology, and later conciliar definitions rather than treating “Christian creed” as though its terminology appeared all at once. The first seven councils themselves are conventionally listed as Nicaea I, Constantinople I, Ephesus, Chalcedon, Constantinople II, Constantinople III, and Nicaea II.

If you’re studying this for dawah/comparative religion, the next useful step would be a chronological timeline from Jesus → Paul → early Church Fathers → Nicaea → Constantinople → Ephesus → Chalcedon → Great Schism → Reformation, showing exactly when doctrines such as Trinity, divinity of Jesus, Holy Spirit, Theotokos, original sin, papacy, and Filioque became formally defined.

[1]: https://www.vatican.va/content/catechism/en/part_one/section_two.html?utm_source=chatgpt.com “Section Two I. The Creeds”
[2]: https://www.vatican.va/content/catechism/en/part_one/section_two/chapter_one/article_1/paragraph_2_the_father.html?utm_source=chatgpt.com “Paragraph 2. The Father”
[3]: https://www.vatican.va/content/leo-xiv/en/apost_letters/documents/20251123-in-unitate-fidei.html?utm_source=chatgpt.com “Apostolic Letter In Unitate Fidei on the 1700th Anniversary of the Council of Nicaea (23 November 2025)”
[4]: https://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_con_cfaith_doc_19720221_mysterium-filii-dei_en.html?utm_source=chatgpt.com “Declaration for safeguarding the belief in the mysteries of the Incarnation and of the Most Holy Trinity against some recent errors”
[5]: https://www.vatican.va/roman_curia/congregations/cfaith/cti_documents/rc_cti_doc_20250403_1700-nicea_en.html?utm_source=chatgpt.com “Jesus Christ, Son of God, Savior: 1700th Anniversary of the Ecumenical Council of Nicaea (325-2025)”
[6]: https://www.vatican.va/roman_curia/congregations/cfaith/cti_documents/rc_cti_doc_20111129_teologia-oggi_en.html?utm_source=chatgpt.com “Theology Today: Perspectives, Principles and Criteria (2011)”