According to verse 38, a blind man is healed by Jesus, and after seeing Jesus he worships him.
In the Codex Sinaticus, the oldest manuscript of John, dated to 330-years after Jesus, verse 38 is not recorded. The entire verse 38 appears as an additional footnote on the side of the Codex Sinaticus.
Verse 38 was inserted into the bible to prove that Jesus was worshipped and that he acknowledged and allowed the people to worship him.
This proves that the early Jewish-Christians did not interpret Johns gospel in the way we do today. At some point a scribe felt so strongly about the divinity of Jesus that he was compelled to include a footnote into the main text as an actual verse.