John 1:14

14And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

Comment: Jesus must have demonstrated supernatural powers sufficient to convince the author and others ["we"] for them to refer to Jesus as the Son of God. Since God has the power over life and death, Jesus must have manifested this same power in miraculous occurrences not the least of which would be his own resurrection. Why would the author, with a Jewish religious background, be willing to ascribe such a title to a human being unless he was convinced of its truth by seeing Jesus' powers manifest with his own eyes?