Do you have a job, or does your job own you? Well, not on Shabbat, it doesn't. Whether you earn a living by manual labor, toil at a desk job or sell stuff from behind a counter, on Shabbat your job doesn't exist. As the Torah puts it, Shabbat is a day on which "all your work is done."

Nor do we conduct any business transactions on Shabbat, such as shopping, purchasing a meal in a restaurant or going to the theater.