Jesus performed many other signs in the presence of his disciples that are not written in this book. But these are written so that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name.
The Gospel of John is a work of meta-nonfiction because it is a true piece of literature that acknowledges itself as literature. In fact, in verse 31, John shared by the Holy Spirit his whole purpose in writing at all. He wrote so that you would believe and that, by believing, you would have life in Jesus’ name. Life! While the Gospel of Matthew was originally intended to convince Jews that Jesus is the Messiah, this Gospel of John was aimed initially at everyone else in the world. Its original purpose was to show Gentiles that Jesus is the Messiah, it fulfilled that purpose perfectly for its original readers, and it still fulfills that purpose perfectly today! When someone who does not know Jesus reads the Gospel of John and the Spirit of God shows up, the spiritually dead come to life as they read.
I am amazed at how effective this Book still is. It fulfills its original intent perfectly. It convinces Gentiles that Jesus is Lord. I have led just a couple of orthodox Jews to faith in Christ as far as I know or remember and both of these involved the Gospel of Matthew. However, for the dozen or so militant atheists I have led to Christ in my life so far, the Gospel of John has been my go-to text because it does exactly what John hoped it would do in these two verses.
The coordinating conjunction “but” (ταῦτα δὲ, meaning “these, however”) is used to start verse 31 instead of the word “also” or κἀγώ. John could have provided us with a rapid-fire parade of miraculous proofs, but instead he provided the Gospel of John: the story.
Why would some skeptics, like the Pharisees who saw almost all of Jesus’ miracles, refuse to believe even if God gave them yet another miracle?
Pray: Ask God to guide you to someone whom He wants to save through the reading of the Gospel of John, then be prepared to give that person a digital or printed copy of it!