„One of the most distinguished words in the Bible is the word qadosh, 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 qadosh 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.“
Abraham Joshua Heschel