From a Jewish worship and prayer book:
"The meaning of Shabbat is to celebrate time rather than space. Six days a week we live under the tyranny of things of space; on Shabbat we try to become attuned to holiness in time. It is a day on which we are called upon to share in what is eternal in time, to turn from the results of creation to the mystery of creation, from the world of creation to the creation of the world."
Practice - with joy - the Sabbath!