How Did the First Christians Become Christians?

In a matter of weeks after Jesus’ crucifixion, thousands of Jews gathered in Jerusalem on the Day of Pentecost. The Holy Spirit fell on the apostles, and Peter preached the first gospel sermon. 3,000 souls responded to the message and got saved. How did they do that? 
Let me show you.

Peter reached a conclusion when he said, “Therefore let all the house of Israel know for certain that God has made Him both Lord and Christ—this Jesus whom you crucified.” They needed to believe in Jesus. That’s the first step.

Since Peter pointed out their sin of murdering Jesus, they felt guilty and realized they needed salvation. They asked, “Brethren, what shall we do?” They wanted to know how to be saved.

Different “gospels” provide different answers.


What is the Biblical answer to the question they asked? It’s in verse 38: Peter said to them, “Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit.”

Romans 10:10 adds another step: “With the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.”

So, after you believe, what should you do next? Repent, confess, and be baptized. If you do, you will receive the forgiveness of your sins, according to the Bible.


In this article series, I have presented the big picture of the Bible. You’ve learned…

  • There is only one gospel.
  • How the Old Testament animal sacrifice system worked.
  • How Jesus fulfilled that system by offering Himself.
  • We must die to sin, which begins at the point of baptism.

Watch the following video for a fascinating, visual recap of this information.

Thank you so much for your interest in learning the Big Picture of the Bible! We hope this information has been helpful. If you would like to be baptized or if you have any questions, I’d love to help. Don’t hesitate to contact me!

Published by

Adam Willingham

I'm a regular guy and a Christian who happens to preach full-time. I'm also a husband and a father of three. And a martial artist.

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