Who wrote it?
John 21:20–24 describes the author of the gospel of John as “the disciple whom Jesus loved,” and for both historical and internal reasons this is understood to be John the Apostle, one of the sons of Zebedee (Luke 5:10).

When(ish) was it written?
Discovery of certain papyrus fragments dated around AD 135 require the gospel of John to have been written, copied, and circulated before then. And, while some think it was written before Jerusalem was destroyed (AD 70), AD 85—90 is a more accepted time for the writing of the gospel of John.

Why was it written?
The author cites the purpose of the gospel of John as follows: “But these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name” (John 20:31). Unlike the three Synoptic Gospels (Matthew, Mark, and Luke), John’s purpose is not to present a chronological narrative of the life of Christ but to display His deity. John sought to strengthen the faith of second-generation believers and bring about faith in others, but he also sought to correct a false teaching that was spreading in the first century. John emphasized Jesus Christ as “the Son of God,” fully God and fully man, contrary to a false doctrine that taught the “Christ-spirit” came upon the human Jesus at His baptism and left Him at the crucifixion.

Some Key Verses
In the beginning was the Word, and the Word was with God, and the Word was God.. . . And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.
– John 1:1, 14
The next day he saw Jesus coming toward him, and said, “Behold, the Lamb of God, who takes away the sin of the world!”
– John 1:29
For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.
– John 3:16
Jesus answered them, “This is the work of God, that you believe in him whom he has sent.”
– John 6:29
The thief comes only to steal and kill and destroy. I came that they may have life and have it abundantly.
– John 10:10
I give them eternal life, and they will never perish, and no one will snatch them out of my hand.
– John 10:28
Jesus said to her, “I am the resurrection and the life. Whoever believes in me, though he die, yet shall he live, and everyone who lives and believes in me shall never die. Do you believe this?”
– John 11:25–26
By this all people will know that you are my disciples, if you have love for one another.
– John 13:35
Jesus said to him, “I am the way, and the truth, and the life. No one comes to the Father except through me.”
– John 14:6
Jesus said to him, “Have I been with you so long, and you still do not know me, Philip? Whoever has seen me has seen the Father. How can you say, ‘Show us the Father’?
– John 14:9
Sanctify them in the truth; your word is truth.
– John 17:17
When Jesus had received the sour wine, he said, “It is finished,” and he bowed his head and gave up his spirit.
– John 19:30
Jesus said to him, “Have you believed because you have seen me? Blessed are those who have not seen and yet have believed.”
-John 20:29
A Quick Summary
John includes only seven miracles—John calls them “signs”—to demonstrate the deity of Christ and illustrate His ministry. Some of these miracles and stories, such as the raising of Lazarus, are found only in John. His is the most theological of the four Gospels, and he often gives the reason behind events mentioned in the other gospels. The gospel of John shares much about the approaching ministry of the Holy Spirit after Jesus’ ascension. There are certain words or phrases that create a recurring theme in the gospel of John: believe, witness, comforter, life – death, light – darkness, I Am, and love.

John introduces Jesus Christ, not from His birth, but from “the beginning,” before creation. John calls Jesus “the Word” (Logos) who, as God Himself, was involved in every aspect of creation (John 1:1–3) and who later became flesh (verse 14) in order that He might take away our sins as the spotless Lamb of God (verse 29). The gospel of John includes several spiritual conversations, such as Jesus’ talk with the Samaritan woman that shows Him as the Messiah (John 4:26), and Jesus’ meeting with Nicodemus that explains salvation through by His vicarious death on the cross (John 3:14–16). In the gospel of John, Jesus repeatedly angers the Jewish leaders by correcting them (John 2:13–16), healing on the Sabbath, and claiming traits belonging only to God (John 5:18; 8:56–59; 9:6, 16; 10:33).

The last nine chapters of John deal with the final week of Jesus’ life. Jesus prepares His disciples for His coming death and for their ministry after His resurrection and ascension (John 14–17). He then willingly dies on the cross in our place (John 10:15–18), paying our sin debt in full (John 19:30) so that whoever trusts in Him will be saved (John 3:14–16). Jesus then rises from the dead, convincing even the most doubting of His disciples that He is God and Master (John 20:24–29).

Old Testament Ties
John’s portrayal of Jesus as the God of the Old Testament is seen most emphatically in the seven “I Am” statements of Jesus. He is the “Bread of life” (John 6:35), provided by God to feed the souls of His people, just as He provided manna from heaven to feed the Israelites in the wilderness (Exodus 16:11–36). Jesus is the “Light of the world” (John 8:12), the same Light that God promised to His people in the Old Testament (Isaiah 30:26; 60:19–22), and which will find its culmination in the New Jerusalem when Christ the Lamb will be its Light (Revelation 21:23). Two of the “I Am” statements refer to Jesus as both the “Good Shepherd” and the “Door of the sheep.” Here are clear references to Jesus as the God of the Old Testament, the Shepherd of Israel (Psalm 23:1; 80:1; Jeremiah 31:10; Ezekiel 34:23) and, as the only Door into the sheepfold, the only way of salvation.

The Jews believed in the resurrection and, in fact, used the doctrine to try to trick Jesus into making statements they could use against Him. But His statement at the tomb of Lazarus, “I am the resurrection and the life” (John 11:25), must have astounded them. He was claiming to be the cause of resurrection, and in possession of the power of life and death. None other than God Himself could claim such a thing. Similarly, Jesus’ claim to be “the way, and the truth, and the life” (John 14:6) linked Him unmistakably to the Old Testament. His is the “Way of Holiness” prophesied in Isaiah 35:8; He established the City of Truth of Zechariah 8:3 when He was in Jerusalem, and preached the truths of the Gospel. As “the Life,” Jesus affirms His deity, the Creator of life, God incarnate (John 1:1–3; Genesis 2:7). Finally, as the “true Vine” (John 15:1, 5), Jesus identifies Himself with the nation of Israel, who are called the vineyard of the Lord in many Old Testament passages. As the true Vine of the vineyard of Israel, He portrays Himself as the Lord of the “true Israel”—all those who would come to Him in faith (cf. Romans 9:6).

What does this mean?
John continues to fulfill its purpose of evangelizing the lost (John 3:16 is likely the best-known Bible verse), and is often used in evangelistic Bible studies. In the recorded encounters between Jesus and Nicodemus and the woman at the well (chapters 3—4), we learn much from Jesus’ model of personal evangelism. His comforting words to His disciples before His death (John 14:1–6, 16; 16:33) are still of great comfort in sorrowful times. Jesus’ “high priestly prayer” for believers in chapter 17 is also a wonderful source of encouragement for believers. John’s teachings concerning the deity of Christ (John 1:1–3, 14; 5:22–23; 8:58; 14:8–9; 20:28) are helpful in apologetics and provide a clear revelation of who Jesus is: fully God and fully man.

Discussion Questions
Take a few minutes to read aloud the Scripture from John 9, John 20:31, Daniel 7:13-14, 2 Corinthians 4:4. What verses or ideas stand out to you from these passages? What questions do you have? What “next step” are you considering as a result of your interaction with God’s Word?
Think back to your life before you were a follower of Jesus. How has God helped you see what you were spiritually blind to in the past? How have you grown spiritually?
The stories of how we came to faith are powerful examples of God‘s faithfulness. In what ways can you share how Jesus has worked in your life with others?
Even if we believe, we still struggle with spiritual blindness in how we look to other things to satisfy us. What does it look like for you to keep your eyes on Jesus as you walk in faith?
Jesus’s compassion is evident in how he sees the blind man in his brokenness and heals him. In what ways can you “see” those in your life and show love and compassion as Jesus does?