On this coming Lord’s Day we will take our fourth and final look at the Fourth Commandment in the Decalogue. Having surveyed the Old Testament background of this Commandment and traced the development of the ‘Sabbath theme’ from creation to the incarnation of our Lord Jesus Christ, we will now seek to apply this Commandment to the life and witness of the New Testament Church. Of primary concern to most of us is why the first Christians stopped observing the Sabbath, the seventh day, and met for their corporate worship on Sunday, the first day. What brought about such a drastic change? What is the connection, if any, between the Sabbath and Sunday? And do the Old Covenant restrictions of work on the seventh day still apply to the first day? Each of these questions is very important, and we must proceed with great care and prayer as we seek to answer them in light of the New Testament’s witness to Christ as the “end of the Law” (Romans 10:4).