Notice how we are commanded to sanctify the day. The emphasis here is on being free. God says, "Remember [on this day] that you were a slave." The implication is obvious. When the Israelites were slaves, they had no freedom to make choices. Therefore, if we keep this day properly, we can remain free. If properly used, the Sabbath compels us to remember the past as well as to look forward to where our lives are headed.
We do this through Bible study and hearing sound, inspired messages combined with meditation and conversation in fellowship. In church services we hear a great deal about the Kingdom of God and the world today. Most messages involve sin in some way. Sin is the transgression of the law (I John 3:4), but the Ten Commandments are the law of liberty (James 1:25). By keeping them, we remain free of enslavement by Satan, this world, and death. On the Sabbath, God instructs His people through His Word on how to keep His commandments and thus remain free. Exodus 16:4, 25-30 explains further:
Then the LORD said to Moses, "Behold, I will rain bread from heaven for you. And the people shall go out and gather a certain quota every day, that I may test them, whether they will walk in My law or not." . . . Then Moses said, "Eat that today, for today is a Sabbath to the LORD; today you will not find it in the field. Six days you shall gather it, but on the seventh day, the Sabbath, there will be none." Now it happened that some of the people went out on the seventh day to gather, but they found none. And the LORD said to Moses, "How long do you refuse to keep My commandments and My laws? See! For the LORD has given you the Sabbath; therefore He gives you on the sixth day bread for two days. Let every man remain in his place; let no man go out of his place on the seventh day." So the people rested on the seventh day.
The first commandment that God specifically revealed after He freed Israel from slavery was the one intended to keep them free, the Sabbath. God gave them this witness of a double portion of manna on the sixth day and none on the seventh for forty years! Contrary to those who assert the Sabbath has been done away or replaced, the Sabbath is a wonderful gift of God.