Christians have always assumed that the words attributed to Jesus in the Gospel of John were really spoken by him (in Aramaic of course, not English). Leading and highly respected reference works (authored mainly by Christian scholars) have for a long time thought otherwise, for good historical reasons.
Here is a short quote from the prestigious Oxford Dictionary of the Christian Church on the ‘Gospel of St John’. After comparing the Gospel of John (‘the Fourth Gospel’) with the so-called synoptic gospels (Matthew, Mark and Luke) the article continues,
What liberties the author of the Fourth Gospel has taken in rewriting the traditions he received is disputed, but there is general agreement that he is largely responsible for their shape and wording.
So the experts ‘generally agree’ that the famous sayings of Jesus such as,
I am the way, the truth, and the life. No one comes to the Father except through Me.
Truly, truly, I say to you, before Abraham was, I am.
I am the Light of the World
..the wording and form of these sayings comes from the mind of John – not of Jesus. Christians tend not to know this and assume, wrongly, that these sayings as they are reported in John are the authentic words of Jesus.
Who can fathom what Jesus really said?