Well, it is one thing to know, another thing to do
Jesus gives us rest, spiritually. And Jesus is on Heaven's throne where there are no days of the week which are determined by the relative position of the sun around the earth. And if we are in Jesus, we have been made to sit together with Him in the Heavenly places (Ephesians 2:4-7), where His rest is (Matthew 11:28-30).
Now, yes, the Bible does prophesy that God's people will keep His Sabbaths, but also it is written how on the new earth there will be no night in the New Jerusalem (Revelation 21:23-25, 22:5). Jesus will be our Light. And Paul says not to despise those who esteem one day more than another, right?
And God's word is meant to discern and expose our real motives (Hebrews 4:12). So, one thing I need to not be doing is trying to find ways to excuse me to look down on other people. But yes I do this. I need to rest from this and its self-righteous workings which can be going on in my mind!!
In the time of Jesus, there were Pharisees whose minds were working very hard, during the Sabbath . . . working very hard to criticize Jesus. And now I suppose there are certain people whose minds on the Sabbath are working quite hard to congratulate themselves that they are doing what is so superior to those who do not copy-cat their ways of acting during the Sabbath. Meanwhile, I might imagine there are Sunday worshipers who can be working very hard in their minds to think down on and talk down on ones who keep the Sabbath.
"He can have compassion on those who are ignorant and going astray, since he himself is also subject to weakness." (Hebrews 5:2)
This is what I need to work on, every day