Name human sin honestly — including your own
The gospel only sounds like good news if the bad news has been heard first. The bad news is that human sin is real, deep, and unfixable from below. All have sinned and fall short of the glory of God (Romans 3:23). The Christian engager should name his own sin first, not the friend's — I have lied, I have hurt the people I love, I have failed people who needed me. This is not Christian groveling; it is Christian honesty. A Muslim friend may have a partial doctrine of sin (sins as zunūb, accumulated wrongs) but rarely the deep biblical category of human sinfulness. Sin in plain language is the wrong I have done and the broken person I am. Naming it in your own voice opens the door for the friend to nod, even quietly.
Walk to Isaiah 53 or 2 Corinthians 5:21 — God paying his own debt
The Bible's deepest answer to sin is not try harder. It is that God himself bore the cost. Isaiah 53:5-6 — written more than 700 years before Jesus — describes a suffering servant who is pierced for our transgressions and crushed for our iniquities: the Lord has laid on him the iniquity of us all. 2 Corinthians 5:21: for our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God. The cross is not divine cruelty (a third party punishing an innocent); it is God himself, in the person of the eternal Son, paying the just debt that human sin had created. Walk to one of these passages — slowly. Quote it; do not summarize. Let the text do its work.
Explain *finished* — and avoid the word *atonement*
John 19:30 — Jesus's last word from the cross — is the Greek tetelestai, it is finished. In ancient Greek commerce, the same word was stamped on a paid invoice: paid in full. The cross is not a down payment on a Christian's improvement project. It is a debt paid in full. Finished is the word a Muslim friend has rarely heard about Jesus's death. Use it. Avoid the word atonement — it is technically correct and pastorally inert. Try instead: Jesus paid what I could not pay. He took what was wrong with me. He carried it, and it is done. Then pause. Let the friend respond. Many Muslim friends, on hearing this for the first time in plain English, are quiet for a long time before they ask the next question.
Worked example
The moment
A curious Muslim friend asks, Why is it good news that a prophet died?
What you might say
"It is the question I had to wrestle with too. Christians do not believe Jesus died because his enemies overpowered him. We believe he died on purpose — that the wrong I have done created a debt I could not pay, and he paid it. The Old Testament book of Isaiah describes it 700 years before it happened: the Lord laid on him the wrong of us all. Jesus's last word on the cross was a single Greek word — tetelestai — it is finished, like an invoice stamped paid in full. That is what Christians mean by good news. May I show you the passage?"
Why this works
The answer names the friend's question as honest, walks to a primary text (Isaiah 53), explains finished in plain English (paid in full), and offers to open the Bible together rather than concluding the argument.
Watch out for
- Using the word atonement before the friend asks. It is correct but pastorally inert in a first conversation.
- Skipping the bad news. I tried hard enough sounds like the gospel only if you have not first heard I cannot try hard enough.
- Making the cross sound like divine child abuse. The Christian doctrine is that God himself, in the person of the Son, paid the debt — not a third party suffering on behalf of a hostile God.