Do you understand the "Law of Exclusion?" Simply stated, it says that when anything is specifically mentioned to be done then everything else is excluded. For instance, when the bread and fruit of the vine only are mentioned for the memorial feast of the Lord's death then nothing else is to be used. This law excludes everything not authorized in worship. It is an important law when considering proper worship in the church of Christ. For instance, have you ever considered that no one can find New Testament authority for the use of a praise band, an orchestra, or any part thereof such a piano or organ, in worship in the Lord's church. The nine references to music in worship in the New Testament all refer to vocal music. Sometimes in an effort to offset this evident point, proponents of such innovations will say, "But the Bible does not say not to use mechanical instruments of music." Yes, it does! When we are told what to do the "law of exclusion" rules out anything else. As an example of this, when God told Nadab and Abihu what to offer, they sinned by offering something else (Lev. 10:1-2). When you order a steak from a menu, that rules out chicken or ham! In fact, your exact order cancels all the rest of the menu in that category. The Law of Exclusion also rules out any other day for the Lord's supper except the first day of the week (Acts 20:7) as well as any other elements than the bread and the fruit of the vine (Mark 14). We cannot put apple jelly on the bread to "aid our worship" nor can we substitute cake and ice cream for the proper elements of the Lord's table! To go beyond the doctrine of Christ is sin (2 John 1:9) just as surely as falling short of His directives (James 4:17).