4139 - If creation occurs continuously, what is Shabbat's significance, when Hashem rested?

After Hashem finished creating the heavens and the earth, there is nothing new under the sun; what He creates continuously renews the old. In the initial days of creation, everything was entirely new; there was nothing there before. https://www.torahrecordings.com/rebbe/igroskodesh/012/005/4139