The Bible describes a covenant between God and the people of Israel. After Moses leads Israel out of captivity, the people agree to obey God, and God promises to bless the people. It is from this covenant, or testament, that the name of the first part of the Bible, the Old Testament, derives.
Then Moses went up to God, and the Lord…said, “This is what you are to…tell the people of Israel: ‘…if you obey me fully and keep my covenant, then out of all nations you will be my treasured possession….’”
So Moses went back and summoned the elders of the people and set before them all the words the Lord had commanded him to speak. The people all responded together, “We will do everything the Lord has said.” (Exodus 19:3 – 8 NIV)
In return for keeping the Mosaic Law, Israel is promised prosperity, victory in battle, and honor among the nations. In return for breaking the Mosaic Law, Israel is promised severe punishment.
The Lord will send on you curses, confusion and rebuke in everything you put your hand to, until you are destroyed…because of the evil you have done in forsaking him…. The sky over your head will be bronze, the ground beneath you iron…. Because you did not serve the Lord your God joyfully and gladly in the time of prosperity, therefore in hunger and thirst, in nakedness and dire poverty, you will serve the enemies the Lord sends against you. (Deuteronomy 28:20 – 48 NIV)
The Mosaic Law imposes hundreds of restrictions. The most famous commandments prohibit behavior that obviously harms others, like theft and murder. However, the Mosaic Law also includes instructions for diet, hygiene, economic organization, and even a requirement for rest.
Remember the Sabbath day, to keep it holy. Six days you shall labor, and do all your work, but the seventh day is a Sabbath to the Lord your God. On it you shall not do any work…. (Exodus 20:8-10 ESV)
The Mosaic Covenant seems to impose a heavy burden in exchange for a blessing from God. However, compliance with the Mosaic Law is not just a burden. All of the Mosaic Law, not just the requirement to keep a Sabbath, is also about rest. At the core of the Mosaic Law is the reformation of our desires. Our instinctual desires are boundless, and only by reforming our desires can we escape perpetual labor in their service.
When Jesus explains the Mosaic Law in the Bible, he emphasizes the importance of reforming desires. When asked about the greatest commandment, he answers that all of the Mosaic Law follows from two commandments governing our attitudes.
“Love the Lord your God with all your heart and with all your soul and with all your mind.” This is the first and greatest commandment. And the second is like it: “Love your neighbor as yourself.” All the Law and the Prophets hang on these two commandments. (Matthew 22:37 – 40 NIV)
The Mosaic Law hangs on the commandments Jesus cites because our behavior reflects our attitudes. We harm our neighbors through behavior prohibited in the Mosaic Law after we have failed to love them as we should. In the Sermon on the Mount, Jesus teaches that the failures of attitude that lead to murder make us guilty before God even without the murder itself.
You have heard that it was said to the people long ago, “Do not murder, and anyone who murders will be subject to judgment.” But I tell you that anyone who is angry with his brother will be subject to judgment. (Matthew 5:21 – 22 NIV)
The first part of the Bible is called the Old Testament because Christians believe that through Jesus a new covenant is available. Like the Mosaic Covenant, the New Covenant promises both burden and rest. Jesus warns those who would follow him that they must be willing to sacrifice everything (Luke 14:25 – 33). However, he also offers,
Come to me, all you who are weary and burdened, and I will give you rest. Take my yoke upon you and learn from me, for I am gentle and humble in heart, and you will find rest for your souls. For my yoke is easy and my burden is light. (Matthew 11:28 – 30 NIV)
In a letter to the church in Rome, Paul explains that under the New Covenant, burden and rest are two facets of a single gem. The behavior demanded is the natural consequence of the reformation of our desires. While reforming our instinctual desires is difficult, the alternative is to be ruled by them. As Paul writes, to be ruled by our instinctual desires is to live as slaves to cruel masters.
Don’t you know that…you are slaves of the one you obey…. When you were slaves to sin, you were free from the control of righteousness. What benefit did you reap at that time from the things you are now ashamed of? (Romans 6:16 – 21 NIV)
Paul advances a curious method for freeing ourselves. We escape slavery to our instinctual desires by becoming slaves to something better. By surrendering ourselves to God, we accomplish the sacrifice demanded in the New Covenant while also achieving the promised rest.
But thanks be to God that, though you used to be slaves to sin, you have come to obey from your heart the pattern of teaching that has now claimed your allegiance. You have been set free from sin and have become slaves to righteousness. (Romans 6:17 – 18 NIV)
Under the Mosaic Covenant, the people of Israel keep the Mosaic Law in exchange for a blessing from God. The Mosaic Law includes hundreds of commandments, including a weekly Sabbath rest. However, the complex requirements of the Mosaic Law hang on a simple transformation. Both the Mosaic Covenant and the New Covenant that follows call for the reformation of our desires. By reforming our desires, we escape endless pursuit of their limitless demands. The Mosaic Law not only prohibits work on the Sabbath but also shows the way to a deeper rest.