You have the Gospel today only through the actions of the Catholic Church. FOr the first 350+ years after the first Pentecost there was no bible, only the verbal Traditions of the Church and later in numerous written accounts, most of which were errant. In 382 AD St. Pope Damasus I, in his efforts to standardize the Mass, called upon the Council of Rome for a formal Lectionary to be used in conjunction with the Liturgy of the Word in the Mass. The council selected 26 books from among nearly 600 texts in circulation based upon the criteria (canon) that they fully comported with Catholic teaching. Therefore, any text, interpretation, doctrine or belief that does not comport with Catholic teaching is not biblical or valid.