John 8:58
Jesus said to them, "Most assuredly, I say to you, before Abraham was, I Am."
the Gospel of John says what you should believe
it is this:
"But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name."
(John 20:31)
#Jesus
everything that is written in the Gospel of John points to this:
"But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name." (John 20:31)
many Christians believe that the Gospel of John proves that Jesus is God but they are totally wrong
#Bible
Son of God, not "God the Son"
Thomas believed he was God.

you can't turn anything in the Gospel of John against this:
"But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name."
(John 20:31)
"these are written" includes the words of Thomas and it is clearly stated what you should believe for to have life