the bibles athority on the bible and makeing the bible and passing the bible into print is the roman catholic church. and so with that. the meaning and the words have changed to leave out or adopt new passages.
naturally it assume that the bible was the word of truth. but truth be told that it was written and translated by man, and a resorceful leader of a huge orginations would adopt materals and change passages to suit his ruleing style.
there are books and books out there that are biblical (the dead sea scrolls, the book of mormon, the book of Enoch) but who says that there included in the bible or not. the orginations of churches.
we are missing 18 years out of the bible of christs life, we are missing many years of others life.