JW - need their own bible since they reject Christ as Creator RC's add books to the Bible since The Bible by itself rejects their teachings. Mormons have The Book of Mormon since The Bible does not support their beliefs. Anglicans also require extra books to The Bible to support their version of Christianity. Lutherans have issues, as do Methodists, Baptists and more. .. Matthew 7:13, wide is the gate that leads to destruction. If you fail to place your TOTAL trust in Christ to save you then that wide gate is waiting for you? ... NONE of mans religious practices are required to be JUSTIFIED(SAVED) in the eyes of GOD. Many of mans religious practices/sacraments are wonderful if done ONLY in a manner that thanks or glorifies GOD.
