The Fullness of Truth in the Catholic Church

Catholics believe that while other religions and Protestant denominations contain goodness and truth, the fullness of truth is found in the Catholic church. The difference in the number of books in the Protestant Bible (66) and the Catholic Bible (73) dates back to the 1500s when Martin Luther removed seven books. Prior to that, for the first 1500 years after the canon was established, the Christian church, which included Catholics, consisted of 73 books. The exposure to the additional seven books may have been a new experience for non-Catholic Christians.