Luke makes it clear that the reason why more Jews in Berea believed than those in Thessalonica is because, being noble in their attitudes, instead of arguing, they searched the Scriptures daily to see whether the things that Paul said were true (Acts 17:11-12).
This is an important fact that every Christian should remember—whenever you can get people to earnestly search the Scriptures as the Bereans did to see if the message you present is true, you will probably begin to see converts .
Don’t settle for telling people about your experience; get them checking up on what you say in their Bibles. It is the through the hearing of the Word that people are saved.
Notice, they didn’t search to see where Paul was wrong, but for where he was right. That was why they were called “noble.”
My suggestion is to get them reading the Gospel of John.
Because the purpose for which it was written was to bring people to faith in Christ (See John 20:30-31). God uses what He has caused to be written for the purposes He had in mind when doing so. Probably more people have been saved by understanding and believing the teachings of this simple, but profound, Gospel than from any other portion of Scripture.