Getting ready for vacation, I am reflecting on the words of the great Rabbi Abraham Joshua Heschel in The Sabbath: It's Meaning for Modern Man:
One of the most distinguished words in the Bible is the word kadosh, holy; a word which more than any other is representative of the mystery and majesty of the divine. Now what was the first holy object in the history of the world? Was it a mountain? Was it an altar?
It is, indeed, a unique occasion at which the distinguished word kadosh is used for the first time: in the Book of Genesis at the end of the story of creation. How extremely significant is the fact that it is applied to time: "And God blessed the seventh day and made it holy." There is no reference in the record of creation to any object in space that would be endowed with the quality of holiness.
This is a radical departure from accustomed religious thinking. The mythical mind would expect that, after heaven and earth have been established, God would create a holy place--a holy mountain or a holy spring--whereupon a sanctuary is to be established. Yet it seems as if to the Bible it is holiness in time, the Sabbath, which comes first.
When history began, there was only one holiness in the world, holiness in time. When at Sinai the word of God was about to be voiced, a call for holiness in man was proclaimed: "Thou shalt be unto me a holy people." It was only after the people had succumbed to the temptation of worshipping a thing, a golden calf, that the erection of a Tabernacle, of holiness in space, was commanded. The sanctity of time came first, the sanctity of man came second, and the sanctity of space last. Time was hallowed by God; space, the Tabernacle, was consecrated by Moses.
While the festivals celebrate events that happened in time, the date of the month assigned for each festival in the calendar is determined by the life in nature. Passover and the Feast of Booths [Sukkot], for example, coincide with the full moon, and the date of all festivals is a day in the month, and the month is a reflection of what goes on periodically in the realm of nature, since the Jewish month begins with the new moon, with the reappearance of the lunar crescent in the evening sky. In contrast, the Sabbath is entirely independent of the month and unrelated to the moon. Its date is not determined by any event in nature, such as the new moon, but by the act of creation. Thus the essence of the Sabbath is completely detached from the world of space.
The meaning of the Sabbath is to celebrate time rather than space. Six days a week we live under the tyranny of things of space; on the Sabbath 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.