Belief in the gospel of Jesus is necessary for salvation!
Someone is not saved simply by hearing the gospel. We must believe it if we are to please God and receive His grace in the forgiveness of our sins.
Philippian Jailer
Jews in Jerusalem on Pentecost
Apostles' Great Commission
Bible's Golden Text
The Gospel Produces Faith Through Evidence
This evidence includes Jesus' miracles, testimony about who Jesus is from God Himself, and finally the resurrection of Jesus Christ.
If one believes Jesus is Lord, they will act on what Jesus says. Belief is NOT just acknowledgement of who Jesus is. The devil and demons believe who Jesus is but are clearly not saved—James 4:19.
Examples of People Who Acted on Their Faith
When we see the necessity of an active, obedient faith in Christ and His gospel, it should motivate us to truly examine the evidence and know if these are really true or not.
If I believe, what will that faith cause me to do?