John identifies several Passovers that span the length of Christ's ministry, and the first Passover that is identified is the one when Jesus cleanses the temple. Since the synoptic gospels say that this happened on the last week before Jesus' death, this raises the very real possibility that Christ cleansed it more than once.

Jerusalem was packed during the days leading up the Passover, and to avoid having travelers driving livestock through the town, the livestock trade was brought into the outer court, the court of the Gentiles. The business of the Passover had taken over, which was a pragmatic reaction to the logistics of managing the Passover sacrifice. So Jesus drives the merchants out of the temple, fulfilling the prophecy in Psalm 69.

Nicodemus comes to see Jesus, who tells him that he needs to be born again. This confuses Nicodemus, since conversion was not something that he expected.

John's gospel takes the baptism of Jesus by John the Baptist at length, because John the Evangelist was a disciple of John the Baptist, and then discusses several signs. A sign is something that signifies something else, in this case, pointing to the spiritual reality that we might not otherwise notice.

The first sign is the Wedding Feast at Cana. The wine runs out at a wedding feast, and Mary (never called by name in John's gospel) asks him to do something. Jesus asks what the situation had to do with Jesus and Mary, but still changes water into wine, signifying the importance of a wedding and thus blessing the ceremony. Doing this, we know that he is able to change reality. He can alter reality and he isn't just changing perception.

Jesus was present at the creation, and all created things were created through Him. In that beginning, the Son was in dynamic relationship with the Father. John talks in the introduction about logos (the Word), life and light, which can be used, along with love, as a mnemonic of John's themes for English speakers. John the Evangelist then takes time to talk about John the Baptist. The Jewish establishment came to ask John who he was shortly after he baptised Jesus, and John tells them that he is the voice of one crying in the wilderness as foretold in Isaiah. John proclaims Jesus the Son of God, and shortly thereafter, disciples begin to follow Him.

The Church recognizes four apostolic witnesses to the Gospel. Three of them are known as synoptic, that is, they recount the same events. The Gospel according to John, however, recounts many events that do not appear in the other three. John states that he is writing so that we may believe, but it seems that this was written to Christians, so that they might truly believe in a time when the Jewish and Christian groups were diverging. Irenaeus, who was the disciple of one of John's disciples, states that this was written by John.

John's gospel begins by recounting Jesus' signs and quickly leads to His passion, which begins the most significant aspect of the Gospel.