—Leviticus 16:31 (NASB)
Western civilization has taken the concept of the sabbath, expanded and called it "weekend", and purports that this is a time to "rest" from work. It's interesting that throughout Scripture when God speaks of "rest" as an extension of "the sabbath" that it's described as having a kind of "rest" that's very different from that of a "weekend". Whereas the weekend is really about fun, play, and getting away from it all, God qualifies His definition of rest with "solemn" and further explains that it's purpose is "that you may humble your souls".
I'm not talking about going to church here. The biblical sabbath lasted much longer than the time spent at the local synagogue. This has to do with time and behavior that extends beyond a token appearance at church. There are many things that may qualify as "rest", but how many of them would you define as "solemn rest"? There are many end goals that "rest" can result in, but how many restore humbleness to your soul? It's not a very well-kept secret that many think of church as a "chore", something to get out of the way so they can move on to the weekend things they REALLY want to do, which are neither solemn nor humble.
Biblical rest is an extension of the processes of salvation and sanctification, of continuing to refine our behavior and attitude in further obedience and submission to Him. Just as we need to change our thinking and preparation in our approach to worship, so in kind such an adjustment regarding rest is desperately needed. It's not about "getting away from it all", but giving it all to Him.†††