Another answer from our community:
There are none. There are some things hard to understand and especially many deep spiritual truths, but no contradictions. Since John, like the rest of scripture is divinely inspired, God knew what He wanted written through the mind and pen of John. He did not forget as He went nor did He contradict what He said previously in other places.
Actually all 12 were there.
Johns Varghese has written: 'The imagery of love in the Gospel of John' -- subject(s): Bible, Commentaries, Love, Biblical teaching
List three ways johns gospel Differs from the synoptic gospels
John--the beloved disciple--had a tough life after Jesus. He was captured by the Romans and sent to the Island of Patmos.
Why are there contradictions in the biblical narratives?
These were two different Johns, attributed to two different books.
Resolving Contradictions was created in 1978-03.
Contradictions Collapse was created on 1991-10-01.
Contradictions - album - was created on 1999-11-09.
John was the most beloved disciple. Like the rest of the disciples, he was commissioned to preach the gospel and to heal the sick. John also received the revelation of the end days.
There are a number of contradictions, but most of these can be harmonised.For instance, in Matthew, Jesus' last words are "my god, my god, why have you forsaken me?". In Luke, they are "Father, into your hands I commend my spirit". In John, they are "It is finished."People defending biblical innerancy argue that Jesus actually said all of these things, but each gospel writer ignored the bits that the other gospel writers caught. It is likely that things like the above are contradictions and sometimes the gospels can be wrong, but in terms of Aristotolean logic, these are not strictly "contradictions"There are some other cases when the bible does contradict itself directly, but these are less common. For instance, in the synoptic gospels, Jesus dies after the first day of passover. In John's gospel, he dies on the day of preparation for the passover. All contemporary scholars accept that John is not correct, but has claimed that date to draw parallels between Jesus and the sacrificing of a passover lamb.
The main purpose of writing John's Gospel was to present Jesus as the divine Son of God and to strengthen the faith of believers in his identity and teachings. John also aimed to show how Jesus fulfilled Old Testament prophecies and to invite readers to believe in him for eternal life.