John 20:31 Meaning: Why John Wrote His Gospel

The Greek word for “are written” is gegraptai, a perfect tense. It means something was completed in the past and still stands written. John’s Gospel isn’t just a report that grows old; it keeps doing its work every time someone reads it.

The word for “believe” is pisteuō, and it runs through John’s Gospel like a heartbeat. In Greek it means more than agreeing with facts. It means to trust, to rely on, to place your weight on someone. John wants readers to move from hearing about Jesus to trusting him personally.

The word for “life” is zōē. Throughout John’s Gospel, this life is not just breathing and heartbeats. It is the full, eternal life that belongs to God himself. And John says you can have that life now, in the present tense, by believing in Jesus’ name. The name stands for everything Jesus is and does.

Christians have read this verse as the key to John’s whole Gospel. Wesley saw it as confirmation of faith, not its first spark. Calvin said John wrote enough to satisfy us, so we don’t need to chase every unknown detail. The Cambridge Bible notes that John was not writing a full biography but a gospel: a selection of signs designed to produce saving faith.

Barnes argued that John built a careful, connected demonstration that Jesus is the Messiah. Gill pointed out that both titles matter: “Christ” points to his office, “Son of God” to his divine nature. Across traditions, readers agree this verse tells us why John wrote, and that his purpose still stands.

Some read “these are written” and think John means only the resurrection stories in chapter 20. In fact, he is referring to everything he has recorded in the whole Gospel. The resurrection is the final sign, but John’s entire book, from the miracle at Cana to the conversations with Nicodemus and the Samaritan woman, is written to lead readers to believe that Jesus is the Christ, the Son of God, and to receive life through that belief.

This week, when you open John’s Gospel, you are doing exactly what John hoped you would. He didn’t write for scholars in a library; he wrote for ordinary people like you, people who need to know if Jesus can be trusted. As you read, let the question sit with you: Do I believe that Jesus is the Christ, the Son of God? And if your answer wavers, that is okay. John chose these signs to help you believe. You don’t have to force faith. You can ask God to use the words on the page to grow trust in your heart. That is the whole point.