Sabbath honors the necessary wisdom of dormancy. If certain plant species, for example, do not lie dormant for winter, they will not bear fruit in the spring. If this continues for more than a season, the plant begins to die. If dormancy continues to be prevented, the entire species will die. A period of rest – in which nutrition and fertility most reality coalesce – is not simply a human psychological convenience; it is a spiritual and biological necessity.
Wayne Muller, Sabbath