The Meaning of Hypostasis and Person: Comparative Approaches between Christianity and Islam

Introduction
In interreligious dialogue, the term "Person" applied to the divinity often leads to profound misunderstandings. To the uninitiated observer, speaking of "Three Persons" in the Christian Trinity might suggest the existence of "Three Gods". Conversely, attributing the term "Person" (Shakhs) to God in the Islamic tradition may surprise those who see it as a risk of anthropomorphism.
The central issue is to define whether the concept of "Person" denotes an autonomous and separate individual or expresses a mode of existence specific to the Divine Essence. This study analyzes the technical meaning of Hypostasis in Christianity and the validity of the term Shakhs in the scriptural sources of Islam.
The Christian Hypostasis: A Relational Identity
In Christian theology, the Greek term Hypostasis (translated into Latin as Persona) should not be confused with the modern notion of an individual or biologically separate entity.
Definition and Metaphysical Distinction
"Person" denotes a relational identity within the unique Divine Being. It indicates a real distinction but in no way implies a separation of substance, will, or essence. To clarify this distinction, theologians use two key concepts:
Ousia (Essence): It relates to the common nature of God (what He is).
Hypostasis (Person): It relates to the distinct existence that possesses this nature (who He is).
The Heritage of the Church Fathers
Saint Basil the Great emphasizes that Essence is what is common, while Hypostasis is what is particular. According to him, the distinction lies exclusively in "Relation" and not in the divine nature. Saint Ephrem the Syrian, on the other hand, uses the Syriac term Qnoumo to express this distinction within absolute unity, thus avoiding any division of being.
Finally, the Latin author Boethius acknowledged the difficulty of finding a perfect synonym for the Greek but validated the use of "Person" to express a rational being possessing the Divine Essence while preserving the unity of substance.
The Term "Person" (Shakhs) in the Islamic Tradition
Contrary to popular belief, the term "Person" (Shakhs) is not foreign to the vocabulary of Muslim sources, although its use is strictly regulated by scriptural texts and the tradition of the Salaf.
Scriptural Foundations and Hadiths
The attribution of the term Shakhs to God comes from authentic Sunnah. A hadith reported by Muslim mentions: "No 'Person' (Shakhs) is more jealous than Allah". Scholars like Judge Abu Ya’la explain that this grammatical structure of comparison implies the affirmation of this name for God.
A second narrative, the hadith of Abu Razin, directly questions the Prophet ﷺ about the vision of God: "How is He a single 'Person' (Shakhs) looking at us and us looking at Him?" Although some scholars have discussed the chain of transmission, the use of the term remains present in reference collections.
Exegesis and Interpretation of Muslim Scholars
The term Shakhs applied to God is understood as an affirmation of His manifest Essence subsisting by itself, without any assimilation to creatures (Tashbih).
Ibn Hajar al-Asqalani specifies in Fath al-Bari that it is a legal metaphor to express “The One who appears by His Essence.”
Al-Razi defines "Person" as the determined Essence and specific Reality necessary to distinguish the Creator from nothingness.
Although some, like Al-Khattabi, have feared a corporeal connotation, the majority of commentators, including Al-Qurtubi and Ibn al-Athir, agree that the term primarily aims to affirm the Zat (divine Essence).
Analysis: Theological Convergences and Nuances
Although both traditions use the word "Person," their theological objectives cater to different needs. In Christianity, Hypostasis serves to explain the internal distinction (Trinity) while maintaining the unity of Essence. In Islam, the term Shakhs serves to affirm the concrete reality of the Divine Essence in the face of interpretations that might reduce it to a mere abstraction.
In both cases, theologians agree on a fundamental point: the use of the term implies neither a composed body nor material division. The risk perceived by Christians is tritheism, while the risk feared by Muslims is anthropomorphism. Yet, both approaches converge on the idea that God is neither a vague force nor simply a philosophical idea, but a Being endowed with real and specific existence.
Conclusion
Saying that God is a "Person" (or exists in three "Persons") never means, in academic and rigorous language, that He is an individual in the human sense of the term.
The Christian Hypostasis protects the idea of a living and relational God without denying His unity of substance. The Islamic Shakhs protects the idea of a real and distinct Divine Essence without denying His absolute transcendence. Ultimately, this term is a technical tool aimed at confessing that God is the Supreme Being, subsisting by Himself, and not merely a philosophical concept.