The Hebrew word translated here as "rested" is the verb shabath, from which comes the noun form that is rendered in English as "Sabbath." Interestingly, the primary meaning of this word is not "rest," in terms of relaxing or rejuvenating, but "to desist from exertion" or "to cease." This makes perfect sense considering that God does not get tired (Isaiah 40:28)!
Genesis 2 states that at the end of Creation Week, God stopped His physical labors, not because He was tired, but because He was setting an example for us. Furthermore, God blessed this specific day of the week and sanctified it—He set it apart for a specific purpose. Just as God deliberately sets apart or sanctifies those people with whom He is working, He purposefully made the seventh day different from the other six.
Thus, not only did God create the Sabbath day—and thus it belongs to Him; Jesus is Lord of the Sabbath (Mark 2:28)—but He also made it separate and distinct from the other six days. So how can we think that this day belongs to us? There is not a single second of this sanctified time that we have authority over! This day is not our day—not for our work, our sports, or our entertainment. It still belongs fully to God, and only He can dictate its right and proper usage.
It is not that we have no part in this day. On the contrary, the Sabbath day is the most important day of the week for us as Christians, because it enhances our relationship with God the most.
When we tithe, we decide whether we are going to tithe by choosing whether or not we will submit to God and follow His way. Once we make the decision to follow God, we give up all claims to the money God requires of us. If we start "deciding" that money is ours to use, we also choose not to submit to God. Similarly, once we decide to follow God, we give up all prior claims to the 24-hour period of the Sabbath, to the extent that God requires us to monitor our speech and even our thoughts (Isaiah 58:13-14)!
We recognize that God has given us a stewardship responsibility in using the money and material possessions He has provided us, and correspondingly, we have a stewardship responsibility over His holy time and its proper use. The Sabbath is not our time. It may belong to God, but He entrusts us with the responsibility to keep it righteously. We had better handle it with care!
David C. Grabbe
It's Not Our Time