Why was John's gospel so different from the synoptic?

[tonychanyt]

Why was John's gospel so different from the synoptic?

I believe John wrote his gospel after the synoptic gospels were written. He intentionally avoided repeating much of the synoptic material.

Jn 20:

30 Jesus performed many other signs in the presence of his disciples, which are not recorded in this book. 31 But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name.

John chose his stories for his particular purposes.

Jn 21:

24 This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true. 25 Jesus did many other things as well. If every one of them were written down, I suppose that even the whole world would not have room for the books that would be written.

 

[Lukaris]

I believe since the Gospels were written to reveal what was necessary for salvation for the Lord’s Second Coming. The emphasis on the Lord’s divinity was preached more than stated in the synoptic Gospels (although they express it also). For ex. Matthew 7:21-23, Matthew 9:4-7, Matthew 10:32-33, Matthew 11:25-27 etc.). I also believe St.Paul shows the influence of St. John in Colossians in ( around 65 AD) See Colossians 1:15-20 and John 1:1-18.

Since we never know when the 2nd Coming will be, the Apostles were passing away, and heretics were corrupting the faith ( 1 John 4:1-3 etc.). The final fullness of the Lord’s revelation had to be preserved in the written word and that being the Gospel of John ( Revelation & the letters of John also).