From another faithStep 2 of 7

One God, not three

The Trinity, explained without the fog.

Start here

Watch this first

What is the Trinity? · Bishop Robert Barron

Give it 3 minutes, then come back and we’ll walk through it together.

Video: What is the Trinity?, Bishop Robert Barron, published Apr 6, 2009. Checked 10 October 2026. Loads from YouTube (privacy-enhanced mode) only when you press play. Watch on YouTube

The Church confesses one God, not three: one God in three persons, Father, Son and Holy Spirit. CCC 253 Confessing Jesus as Lord isn’t contrary to belief in the One God. CCC 202

Watch first Or start reading7 min read · 3 min film
The Trinity, icon by Andrei Rublev: three angels sit in peace around a table with a chalice.

Andrei Rublev, The Trinity, early 15th century. State Tretyakov Gallery, Moscow. Public domain, source.

Journeys / From another faith / Step 2 of 7

On this page

Quick answers to related questions

Keep reading

All 7 steps in From another faith You’re on step 2
  1. 1. Welcome, as you are
  2. 2. One God, not three
  3. 3. Jesus: prophet, and more
  4. 4. The cross and the empty tomb
  5. 5. Mary, honored by both
  6. 6. For Jewish visitors, and every faith
  7. 7. If you want to know more

Next7 min read3 min videoChecked 4 October 2026

The oldest prayer

Every morning and evening for three thousand years, Jews have recited the same words. When a scholar asked Jesus which commandment came first, He answered with them.

“Hear, Israel: The LORD is our God. The LORD is one. You shall love the LORD your God with all your heart, with all your soul, and with all your might.”

Deuteronomy 6:4-5, World English Bible

You’ll need

  • Ten quiet minutes.

Remember One God. Not three. Not solitary.

Key points

  • Catholics don’t confess three Gods. CCC 253
  • God is one but not solitary. CCC 254
  • God is neither man nor woman: “Son” isn’t a physical begetting. CCC 239 CCC 242

What the Church teaches

Here’s what many Muslims have heard their whole lives: Christians say one God, then pray to three. If that were true, it would be a serious problem, and Catholics would agree. So let’s slow down and look at what the Church actually teaches.

“Say: He is Allah, the One! Allah, the eternally Besought of all! He begetteth not nor was begotten. And there is none comparable unto Him.”

The Qur’an, Surah Al-Ikhlas 112:1-4, translated by Marmaduke Pickthall (1930)

Catholics begin where you begin: God is one

Start here: Jesus Himself prayed the great prayer of Israel, the Lord is one. CCC 202 And the Church insists that calling Jesus Lord “is not contrary to belief in the One God.” CCC 202

“Jesus answered, ‘The greatest is: ‘Hear, Israel, the Lord our God, the Lord is one. You shall love the Lord your God with all your heart, with all your soul, with all your mind, and with all your strength.’ This is the first commandment.”

Mark 12:29-30, World English Bible

“The Trinity is One. We do not confess three Gods, but one God in three persons”

Then what does “Father, Son and Holy Spirit” mean?

One God, not three gods; but this one God has shown us His inner life. CCC 253 Father, Son and Holy Spirit are really distinct, yet each is fully God, not a third of God. CCC 253 CCC 254

“God is one but not solitary.”

is notis notis notisisis God FatherSonHoly Spirit
The Shield of the Trinity, a diagram Christians have drawn since the Middle Ages. Each person is God, whole and entire; none is the other; there is one God. CCC 253 CCC 254

And “Son” does not mean God took a wife and had a child; Catholics would call that blasphemy too, since God “is neither man nor woman: he is God.” CCC 239 The Son is “eternally begotten of the Father” and “begotten not made.” CCC 242 No beginning, no biology. CCC 242

What you may have heard

“Christians worship three gods: God, Jesus and Mary.”

What the Church actually teaches

Catholics confess one God, Father, Son and Holy Spirit; Mary is not God, and the honor given her differs essentially from the adoration given to God. CCC 253 CCC 971

An honest note: this is a real difference. Muslims read the Qur’an’s words “He begetteth not nor was begotten” as ruling out any Son of God. Catholics hear a rejection of something we don’t believe either, a God with a physical family, and we hold that the Son is God from God. You don’t have to agree. But now you know what we actually mean.

The verses you might bring: 4:171, 5:73 and 5:116

“O People of the Scripture! Do not exaggerate in your religion nor utter aught concerning Allah save the truth. The Messiah, Jesus son of Mary, was only a messenger of Allah, and His word which He conveyed unto Mary, and a spirit from Him. So believe in Allah and His messengers, and say not "Three" - Cease! (it is) better for you! - Allah is only One Allah. Far is it removed from His Transcendent Majesty that He should have a son. His is all that is in the heavens and all that is in the earth. And Allah is sufficient as Defender.”

The Qur’an, Surah An-Nisa 4:171, translated by Marmaduke Pickthall (1930)

If “Three” means three gods, Catholics agree with this verse: we confess one God, not three, and each divine Person is God whole and entire, not a third of God. CCC 253

Notice, too, what this verse calls Jesus: “His word” and “a spirit from Him.” John’s Gospel opens by calling Jesus the Word. Where we differ is whether that Word is eternal and divine.

“In the beginning was the Word, and the Word was with God, and the Word was God.”

John 1:1, World English Bible

“They surely disbelieve who say: Lo! Allah is the third of three; when there is no Allah save the One Allah. If they desist not from so saying a painful doom will fall on those of them who disbelieve.”

The Qur’an, Surah Al-Maʼidah 5:73, translated by Marmaduke Pickthall (1930)

Christians don’t believe God is one god among three: the Father, the Son and the Holy Spirit are not three gods but one God, which the Church calls “the consubstantial Trinity.” CCC 253 CCC 254

“And when Allah saith: O Jesus, son of Mary! Didst thou say unto mankind: Take me and my mother for two gods beside Allah? he saith: Be glorified! It was not mine to utter that to which I had no right. If I used to say it, then Thou knewest it. Thou knowest what is in my mind, and I know not what is in Thy Mind. Lo! Thou, only Thou, art the Knower of Things Hidden?”

The Qur’an, Surah Al-Maʼidah 5:116, translated by Marmaduke Pickthall (1930)

Treating Jesus and His mother as two gods beside God is something Catholics reject too: Mary is not God, and the honor Catholics give her “differs essentially” from the adoration given to God alone. CCC 971

An honest word: most Muslims read these verses as rejecting Christian belief itself, and we won’t pretend the difference away. The real question between us isn’t “one God or three?” We both say one. It’s whether Jesus is the eternal Son of that one God.

To think about

If God is love, who did He love before He made anything? Christians think that question points straight to the Trinity.

Try this, this week

  1. Read Mark 12:28-30. Notice that Jesus begins with “the Lord is one.”
  2. Ask a Catholic what they mean when they pray “in the name of the Father, and of the Son, and of the Holy Spirit.”

More from the voices of the revival

Who is Jesus?Bishop Robert Barron · Bishop Robert Barron · Jul 10, 2009 · 7 minYouTube

From the official channels of the teachers named. Links checked 10 October 2026; each film was matched to this topic by its title and channel, so treat it as a starting point. Scripture and the Catechism cited on this page are the authority. All videos by topic.

If this is hard

This is the deepest difference between Islam and Christianity, and it’s fine to find it strange or wrong. Understanding isn’t agreement.

How to talk to a priest

Common questions

Tap a question to open it. Every answer is cited.

Step 2 of 7 · From another faith

If God is one, who do Christians say Jesus is?

Step 3: Jesus: prophet, and more

Take it with you

Printable one-page cardDownload card (A4 PDF)Download card (US Letter PDF)

Short link: stoneandincense.com/go/af2

See it

When you’re ready

Every journey here ends with real people, not a website. No pressure, ever.

Your real next step

This page can’t give you the sacraments. A parish can.

We’re just pointing. People walk with you. Find a Catholic parish near you, go to a Mass, or just ask a priest for ten minutes. You don’t need to have it figured out.

Take the next step What to say when you call

Sources on this page

How we know · 6 Catechism paragraphs · 3 Bible passages
  1. Catechism of the Catholic Church, paragraphs 202, 239, 242, 253, 254, 971 (official text on vatican.va).
  2. Scripture (World English Bible, Catholic edition, public domain; modern verse numbers, Douay-Rheims numbers in brackets where they differ): Deuteronomy 6:4-5; Mark 12:29-30; John 1:1.
  3. Video: “What is the Trinity?,” Bishop Robert Barron, YouTube (supporting material, not a teaching source).

Excerpts from the English translation of the Catechism of the Catholic Church for use in the United States of America Copyright © 1994, United States Catholic Conference, Inc. – Libreria Editrice Vaticana. Used with Permission. English translation of the Catechism of the Catholic Church: Modifications from the Editio Typica copyright © 1997, United States Conference of Catholic Bishops – Libreria Editrice Vaticana.

Stone & Incense restates Church teaching in plain words and cites every teaching claim. Our own wording is not an official Church text. Found a mistake? Report an errorCorrections.