There was nobody walking around Jesus and taking notes of what He said. The gospels written years later, here is what Luke has to say about it:
Luke 1:1-3
Since many have undertaken to compile a narrative of the events that have been fulfilled among us, just as those who were eyewitnesses from the beginning and ministers of the word have handed them down to us, I too have decided, after investigating everything accurately anew, to write it down in an orderly sequence for you, most excellent Theophilus,
You seem to think that just because people have the Bible now all of our problems and doctrines are sorted out? While we still have just as many if not more heresies and false teachings as there was back then.
With the Bible being a huge book, you can make it say whatever you want.