How to Turn Grace into a Burden

The title is another placeholder, the title of a sermon that I haven't yet written - but something that was inspired by a recent sermon by my wife, particularly when listening to people speak out of the silence. 

The Sabbath is supposed to be a time of rest: is that punitive? Or part of the joy of recognizing that one is a Child of God? 

God didn't work for seven days straight. Are you more important than God?