With general authority, aids are allowed, but never additions:Song books aid in singing, but do not add another kind of music.Mechanical instruments add another kind of music and usurp His authority.Printed outlines with scripture references aid in Bible classes.Teaching anything other than the Bible in our classes adds another subject of study and usurps His authority.For a church to provide the necessary things for the relief of its needy members aids in its work.For a church to turn the relief of its needy members over to a human institution for relief adds another organization; thus usurps His authority.Bible authority comes to us in one of four forms:Statement of factMark 16:16Matthew 19:4-5 - marriageMatthew 26:29 - Lord’s SupperActs 20:7 - disciples gathered on the first day of the week to break bread and to hear preaching