Millions of people around the world are confused about what they must do to have everlasting life. This easy to read book gives an entertaining and illustrative view of the concept of eternal life and what you must do to receive it.
Lucas Kitchen is an American author of both Christian fiction and non-fiction. He has written over twenty books. His book Naked Grace was an Amazon bestseller in 2020, and For The Sake Of The King was as well in 2021.
The only New Testament book left out of this discussion so far is Acts. Doctor Luke, the author of Acts, had a purpose in writing. His purpose was to legitimize the Apostle Paul's authority,1 and to demonstrate the universality of Christianity,2 after it had spread to the Gentiles.3 Acts is not an evangelistic book.
The early church had a dilemma of sorts. The apostles were those who had witnessed Jesus' post-resurrection appearances and had been with Jesus from his baptism by John until his ascension into heaven.4 There were many who met those criteria but were not apostles,: but at the beginning of the book of Acts, that's what it takes to be an apostle. A number of years later, however, a man began to grow in prominence and claimed to be an apostle. His name was Paul. There was a debate in the churches whether Paul could be considered an apostle since he didn't exactly fit the mold. Luke, Paul's traveling companion and ministry partner, sought to show how Paul had been chosen by Christ to accomplish His work. If it were not for Acts, we would hardly know whether or not Paul was a trustworthy source. If Paul's authority were in question, so too would be a massive portion of the New Testament, since he wrote it. Acts is incredibly important. It operates as the glue that holds the New Testament, the Christian Bible, together.
The secondary purpose of the book of Acts is to announce that the Gospel had gone out to the Gentiles, and they were hearing and receiving the message. Recall, if you will, the phrase that appears at the end of Acts:
Therefore let it be known to you that the salvation of God has been sent to the Gentiles, and they will hear it! (Acts 28:28)
Yet again, this purpose is tied to Paul since it was Paul who was the apostle to the Gentiles. For thousands of years, God told the Israelites not to mix with the Gentiles in marriage or religious practices. Suddenly in the church age, Jews were coming to the faith in their Messiah, but then were expected to share the pew with Gentiles. It was quite a hurdle to be in a congregation with Gentiles who had no regard for the Jewish law and tradition. They weren't even circumcised. This relates to the first purpose of the Book of Acts, in that it was Paul who was bringing all of these Gentiles into the church. There needed to be a strong defense for Paul as an apostle, but also a unified explanation for why mixing with Gentiles in the church was acceptable.
Just about anyone would agree that this purpose is entirely different from that of the Gospel of John. Clearly Acts deals primarily with issues that are important to people who are already saved, but it's not a book written to tell people how to get saved.
Therefore, neither the New Testament letters, the first three Gospels, nor Acts, say that they are written for the purpose of evangelism. They all have different purposes. Anyone who uses these books for evangelism is doing so against the biblical advice of the inherent purposes. Obviously, it's possible to get saved by verses found outside the Gospel of John, but since that Gospel is the only one written for the purpose of evangelism, it ought to be the primary tool used for evangelism. The first three Gospels, Acts, and the letters have often muddied the clear living water found in the Gospel of John.
1 Stanley D. Toussaint, “Acts,” in The Bible Knowledge Commentary: An Exposition of the Scriptures, ed. J. F. Walvoord and R. B. Zuck, vol. 2 (Wheaton, IL: Victor Books, 1985), 350.