The Ten Commandments are well-known by most serious Christians. But are Christians required to follow them today? Are we free from the Law of Moses (which includes the Ten Commandments)? If we are required to follow the Ten Commandments, are we required to follow the fourth commandment, to keep the Sabbath? We seek to answer these questions by looking first at arguments made by Martin Luther around 1520 AD. We then turn to an earlier Christian writer named Eusebius (writing around 320 AD) to examine his arguments. Using the Scripture, logic, and reason, how would you answer these questions?