All life is a form of cosmic celebration. What moves the stars through the heavens, the Earth through its seasons, and human beings through stages of growth and learning -- all is celebration. Look at the birds flying here and there, the flowers blooming, and the trees changing colors in the fall. It's all celebratory. We have only to express and become, ourselves, celebration.
Most people mistakenly believe that all you have to do to stop working is not work. The inventors of the Sabbath understood that it was a much more complicated undertaking. You cannot downshift casually and easily. This is why the Puritan and Jewish Sabbaths were so exactingly intentional. The rules did not exist to torture the faithful. They were meant to communicate the insight that interrupting the ceaseless round of striving requires a surprisingly strenuous act of will, one that has to be bolstered by habit as well as by social sanction.