The fourth, and last, of the Gospels is that of John. It was written about 50 years after Jesus' ascension by the last surviving of His disciples, the apostle John; "the disciple who Jesus loved".
At the time John was writing, the Christian faith had spread and its followers were suffering at the hands of the Roman government. Despite this, John still hoped to spread the good news about Jesus, as He had commanded His disciples after His resurrection. As John says:
John 20:31
"but these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name."
John 8:5-11
"Now Moses in the law commanded us, that such should be stoned: but what sayest thou? This they said, tempting him, that they might have to accuse him. But Jesus stooped down, and with his finger wrote on the ground, as though he heard them not. So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first cast a stone at her. And again he stooped down, and wrote on the ground. And they which heard it, being convicted by their own conscience, went out one by one, beginning at the eldest, even unto the last: and Jesus was left alone, and the woman standing in the midst. When Jesus had lifted up himself, and saw none but the woman, he said unto her, Woman, where are those thine accusers? hath no man condemned thee? She said, No man, Lord. And Jesus said unto her, Neither do I condemn thee: go, and sin no more"