Journeys / From another faith / Step 2 of 7
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All 7 steps in From another faith You’re on step 2
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.”
You’ll need
- Ten quiet minutes.
Remember One God. Not three. Not solitary.
Key points
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.”
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.”
“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.”
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
“Christians worship three gods: God, Jesus and Mary.”
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.”
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.”
“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.”
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?”
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.
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
- Read Mark 12:28-30. Notice that Jesus begins with “the Lord is one.”
- 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.
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 moreTake 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
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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.
Sources on this page
How we know · 6 Catechism paragraphs · 3 Bible passages
- Catechism of the Catholic Church, paragraphs 202, 239, 242, 253, 254, 971 (official text on vatican.va).
- 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.
- 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.

