אמר ר' אלעזר לעולם יסדר אדם שלחנו בע"ש אע"פ שאינו צריך אלא לכזית
Rabbi Elazar said: A person should always set his table on Shabbat eve with all the preparations for an important feast, even if he only needs the table set for a single bite of food.
(א) ויברך אלהים. פי' ברכה תוספות טובה וביום הזה תתחדש בגופות דמות כח בתולדות ובנשמות כח ההכרח והשכל
(ב) ויקדש אותו. שלא נעשתה בו מלאכה כמו חבריו
(1) ויברך, this refers to the addition of something beneficial. The seventh day is distinguished by the fact that it enjoys additional good, i.e. additional Divine blessings. These consist of the fact that the Jew is afforded an opportunity to study Torah in a quiet unhurried setting, allowing him to derive the maximum benefit from such study. G’d extended this blessing at the time when He commanded the Jewish people to observe this day as a day of “rest” by sanctifying that day.
(2) ויקדש אותו, the day was to be sacred in the sense that it is set apart from other days precisely because the Jewish people treat it as such. In other words, its sanctity is due to the way the Jewish people relate to it. This day constitutes a visible sign linking G’d and His people, i.e. that they, just as He, are holy through observing the Sabbath which by itself is testimony to the fact that G’d created the universe. It is a statement aimed at all of mankind announcing that the existence of the universe did not precede the existence of G’d. A researcher has stated that there is a fish in the ocean which does not swim on the Sabbath, spending the entire day resting near the beach or near a rock.
Our sages (Sanhedrin 65) describe the river Sambatyon as carrying huge stone down from the mountain every day of the week except on the Sabbath. This is why it is called Sabbatyon. They report further (Bereshit Rabbah Albeck edition pages 92-93) that the hostile Roman governor Turnusrufus asked Rabbi Akiva (in a sarcastic manner) how the Sabbath was different from the other days of the week. He answered: “what makes one warrior greater than another warrior?” Thereupon he told him that G’d had made it such. Turnusrufus enquired how Rabbi Akiva could prove this. Rabbi Akiva then told him about the strange phenomenon of the river Sambatyon resting on that day and not hurling stones down from the mountain. This simply proves that G’d, the Creator, has equipped His creatures with a sign indicating to them that the universe is the product of His creative activity, and had not preceded His existence. Our sages (Bereshit Rabbah 11,1) also explain the sequence of ויברך...ויקדש in our verse in this fashion when they say ברכו וקדשו במן, “He blessed it and sanctified it by means of the manna,” i.e. by the fact that on that day the manna did not descend from the celestial regions, seeing that G’d already provided a double portion on the previous day.
(3) אשר ברא אלוקים לעשות, He had created them, whereas it was now up to the plants, animals, etc., to continue the process G’d had begun and to perfect the earth as well as themselves, each species according to its potential.

