Home > Module 3: The Son of God vs. Isa
If a Muslim accepts that the Bible claims Jesus is God, they often ask: "Why would God need to become a man? Is He not powerful enough to just forgive us?"
This section argues that if Jesus is merely a prophet (as in the Islamic Isa), then He is fundamentally incapable of solving the problem of human sin but as the Biblical Jesus He can be Savior.
In Christian theology, the gravity of a sin is determined by the one being offended.
The Bible is explicit: no human being, no matter how holy, has the clean "currency" required to buy back a soul from death.
Psalm 49:7–9:
"Truly no man can quite redeem his brother, or give to God the price of his life, for the ransom of their life is costly and can never suffice, that he should live on forever and never see the pit."
If even a "holy man" cannot redeem his own brother, how could a "prophet Isa" (who is also a man) redeem the entire world? If Jesus is only a creature, He is in the same "pit" as the rest of us, needing a Savior Himself.
A finite human being—even a holy prophet—cannot pay an infinite debt. To satisfy infinite justice, the payment must also be infinite. A mere creature cannot save another creature from the judgment of the Creator.
Since the offense is against an Infinite Being, the satisfaction must be made by an Infinite Being. Only God is infinite. Therefore, only God can pay the debt.
A mediator is someone who represents two parties to bring them together. To bridge the gap between a Holy God and sinful humanity, the Mediator must possess the nature of both.
If Jesus were only God:
He could not represent humanity or die for our sins (since God cannot die).
If Jesus were only Man:
He would be a part of the fallen race and would owe his own life to God; he could not save others.
The Solution (The God-Man):
Jesus is fully God (so his sacrifice has infinite value) and fully man (so he can represent us and die in our place).
The Savior Must be the "God-Man" for atonement to work, the Savior must meet two specific criteria. If He lacks either, salvation fails.
Table: The Dual Necessity of the Incarnation
| Why He Must Be Man | Why He Must Be God |
|---|---|
| To represent humanity in death. | To survive the infinite weight of God's wrath. |
| To pay a human debt. | To make the payment of infinite value. |
| To be a sympathetic High Priest (Hebrews 4:15). | To be the Author of Life who conquers death. |
| Scripture: Hebrews 2:17 | Scripture: Colossians 2:9 |
The "Isa" in the Quran is redundant (just another messenger in a long line), while "Jesus" in the Bible is essential.
| Feature | The Prophet (Messenger) | The Savior (Redeemer) |
|---|---|---|
| Primary Task | To deliver a message. | To deliver a people. |
| Source of Authority | "Thus says the Lord." | "I say to you." |
| Relationship to Law | Tells you to keep the Law. | Keeps the Law for you. |
| Problem of Sin | Points out your sin. | Takes away your sin. |
| Final Result | A book of rules to follow. | A person to follow. |
The Quran contains a principle that actually supports the Christian need for a Divine Savior.
Surah 35:18:
"And no bearer of burdens will bear the burden of another. And if a heavily laden soul calls to its load, nothing of it will be carried, even if he should be a close relative."
1 Peter 2:24:
"He himself bore our sins in his body on the tree"
Jesus is not "another" (a separate human). He is the Creator Himself taking the burden of His creatures.
The Bible repeatedly identifies the "Savior" with "Yahweh" (The LORD). If Jesus is the Savior, and only God is the Savior, then Jesus is God.
Isaiah 43:11:
"I am the Lord, and besides me there is no savior."Hosea 13:4:
"But I am the Lord your God... and besides me there is no savior."Titus 2:13:
"...waiting for our blessed hope, the appearing of the glory of our great God and Savior Jesus Christ."Acts 4:12:
"And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved."
Surah 39:53:
"O My servants who have transgressed against themselves... Indeed, Allah forgives all sins."
If only Allah can forgive and "save" from sin, and Jesus claims the power to forgive sins (Mark 2:5–10), then Jesus is either a blasphemer or He is the manifestation of Allah's own saving presence.
The Islamic "Isa" is a prophet who is ultimately redundant (just another messenger), whereas the Biblical "Christ" is the only logical solution to the problem of a Holy God and a sinful humanity.
Muslim Objection:
Allah is Al-Ghafur (The Forgiving). He can just forgive sins without a sacrifice. He doesn't need 'payment'.
Christian Response:
If a judge lets a murderer go free without a penalty, is that judge 'merciful' or is he 'unjust'? We believe God is Perfectly Just and Perfectly Merciful. He cannot ignore sin, or He would not be just. In Christianity, God's justice is satisfied because the penalty was paid, and His mercy is shown because He paid it Himself. On the Cross, Justice and Mercy kissed."
Muslim Objection:
Each person carries their own burden. No one can bear the burden of another (Surah 35:18).
Christian Response:
While it is true that a sinner cannot pay for another sinner, a sinless person can choose to pay the debt of a friend. Think of it like a fine: if I am in debt, I cannot pay your debt. But if a billionaire walks into the courtroom, he has the resources to pay my debt for me. Jesus is the only 'spiritual billionaire' because he has no sin of his own and possesses the infinite riches of divinity."