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 6:35-40
"And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst. But I said unto you, That ye also have seen me, and believe not. All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out. For I came down from heaven, not to do mine own will, but the will of him that sent me. And this is the Father’s will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day. And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day"