Do you believe in the one true God?

Trinitarian Monotheism or Unitarian Monotheism?

Diagram of the Relationship between the Triune God: God the Father, God the Son, and God the Holy Spirit.
Diagram of the Relationship between God the Father, God the Son, and God the Holy Spirit.

Monotheism is one of the similarities between Islam and Christianity and monotheism is also one of the major differences.

The difference is that Muslims are Unitarian monotheists and Christians are Trinitarian monotheists.

The real question is not monotheism, but whether trinitarian or unitarian monotheism is true. 

The Bible and Monotheism

Without doubt, the Old and New Testaments affirm monotheism (Deuteronomy 6:4Mark 12:29), but not the unitarian monotheism of the Quran.

The very first chapter of the Bible affirms monotheism and yet it is not the kind of monotheism found in the Quran (Genesis 1:1-226-27 with John 1:1-3).1

Other biblical examples of monotheism that are not affirmed in the Quran can be found with:

These are not full-blown Trinitarian texts, but they certainly are not full-blown Unitarian texts either. In fact, these and other Old Testament passages agree with the Trinitarian monotheism found in the ministry of Jesus.

Jesus gives the definitive answer to this question (John 10:30):

Jesus is the reason Christians are Trinitarian monotheists (cf. Hebrews 1:1-3).

Trinitarian Monotheism is a Reason the Quran is not the Word of God

Is the Quran the Word of God?  The simple answer: No. The Quran cannot be the Word of God because the Quran denies the One True God of the Bible. The Quran does not affirm Trinitarian monotheism (cf. Quran 4:1715:73).2  Unitarian monotheism is foreign to both Old and New Testament revelation.

An Invitation to Believe in the One True God

If you believe in Jesus, then you should be a Trinitarian monotheist who confesses Jesus as Lord and Savior (John 20:27-28). Believe in Jesus and be baptized in the Triune Name of God (Matthew 28:18-19).

Related Posts

Trinity, Tawheed, and Monotheism

Do Muslims Believe in Jesus?


  1. It is important to understand that God gradually revealed Himself over time,Before the coming of NT redemption, human beings knew God less fully. This deficiency is not an incidental fact arising merely from some mental or moral deficiency in the individual or the society. It is an inevitable consequence of the very structure of history and the structure of redemption. Human knowledge of God can grow only in step with the redemptive operations that work out God’s plan. Consequently, God’s Trinitarian character is only dimly revealed and dimly understood in the OT. Trinitarian theology in its full form rests on NT revelation (Vern Sheridan Poythress, “Reforming Ontology and Logic in the Light of the Trinity: An Application of Van Til’s Idea of Analogy”; Westminster Theological Journal Volume 57:214). []
  2. “Some have suggested that the Qurʾān refutes heretical Christian beliefs (e.g. tritheism, adoptionism, the physical generation of the Son) rather than the orthodox doctrines of the Trinity, Incarnation, etc. In practice, however, the vast majority of Muslim commentators have assumed that the Qurʾān does refute the Trinity, the Incarnation, and the Christian doctrine of divine sonship, especially as these are understood to contradict the central Islamic tenet of the oneness of God” (Kate Zebiri, “Polemic and Polemical Language”; Encyclopaedia of the Qurʾān. General Editor: Jane Dammen McAuliffe . Brill [Leiden and Boston], 2005. CD-ROM version). []