The Point of the Sabbath (Since God never gets tired, why did he rest?)

It is easy for me to think that the Sabbath is about the kind of rest that I am so aware that I need: physical rest after a long week, a break in a busy schedule. For me, the rest is welcome because I am tired. I need the time and space for my mind to lie fallow, the time to refresh. 

Yet God does not tire, as if his strength would be taxed, as if his energy would fade or be consumed. And the text makes no suggestion of that: 

So the heavens and earth were finished, and all the host of them. And on the seventh day God ended his work which he had made, and rested on the seventh day from all his work which he had made. And God blessed the seventh day and made it holy because in it he rested from all his work which he had created and made. (Genesis 2:1-3)

For God, it is more about completion. Just previously to that, we read: 

God saw all that he had made and found it very good. And there was evening and morning, the sixth day. (Genesis 1:31)

For us to enjoy the gift of the Sabbath, of course we rest to enjoy that blessing. Unlike the Lord, we have limits to our power and strength, and we know our human frailty on a daily basis. These passages suggest enjoying the completeness of our work, and the goodness of our work. They also call us to enjoy the completeness of God's work, the sufficiency of the world he has made, and its goodness. From its goodness, we are also reminded of his goodness. 

That is a Sabbath that can refresh me today.