How could the Bible get out if John was on an island?

That is an awesome question! While it is true that John, one of Jesus’ original disciples, was exiled on the Island of Patmos for a time in his life, we also know that he was eventually released and that he most likely ended up in Ephesus where he died.

It was while he was on Patmos, as a prisoner in a penal colony, that John wrote down on a scroll of the things he “saw and heard” when the Lord came to him in a vision. Those writings later became the Book of Revelation. John starts the Book of Revelation with an assurance too:

“The revelation of Jesus Christ, which God gave him to show his servants what must soon take place. He made it known by sending his angel to his servant John, who testifies to everything he saw — that is, the word of God and the testimony of Jesus Christ. Blessed is the one who reads the words of this prophecy, and blessed are those who hear it and take to heart what is written in it, because the time is near.” (Revelation 1:1-3)

Now, remember also that the Holy Bible is a series of historical accounts written by several different authors. They were accounts inspired by the Word of God but men actually wrote the various books. John was just one of those authors. All of his writings are in the New Testament. The Apostle Paul also wrote many of the New Testament books. The Old Testament has many different authors, some of them unknown.

It was a group of early church leaders that assembled all of these different accounts of God’s word in what we call the Holy Bible.