Beraisa: They related about Shammai Hazakein: He would eat every day l’kavod Shabbos. If he found a nice animal [on Sunday] he would say “this is for Shabbos”. If he found a better animal [on Monday] he would put it away for Shabbos and eat the first animal. But Hillel Hazakein followed another system wherein all his deeds were for the sake of Heaven [Shammai did everything l’shem Shomayim as well, but Hillel followed a system of trusting in Hashem] as it states “Hashem is Blessed every day” [there is no need to be anxious on Sunday for the needs of Shabbos. Shammai’s opinion was that when it comes to a mitzvah you need to have less bitachon and do more hishtadlus].
We learned in a Beraisa also thus: Beis Shammai: From Sunday, worry about Shabbos. Beis Hillel: “Hashem is Blessed every day”.
Rabbi Chama b’Rebbi Chanina: One who gives someone a gift, need not inform the recipient [who the giver is, nor the quality of the gift], as it states “Moshe did not know that his face was shining with rays of light”.
Challenge: It states [regarding Shabbos] “So that they know that I am Hashem who makes them holy [by means of Shabbos]”. Hakadosh Baruch Hu said to Moshe: “Moshe, I have a good gift in my treasure house, it’s called Shabbos. I’d like to present it to Yisroel, go and let them know [how great the gift is and that it’s from me, like it states וְיֵדְעוּ כִּי מֵאִתְּךָ הִיא מְנוּחָתָם]”. Rabban Shimon ben Gamliel derived from here that if one gives someone a gift: if he gives a child a piece of bread, he must let the mother know [smear some jelly on his nose so that there is still evidence even after the gift is devoured, this will cause love between neighbors when the child tells his mother “the lady next door gave me a sandwich”].
Resolution: Rabbi Chama b’Rebbi Chanina is referring to a gift which will become evident [thus modesty is preferred]. Rabban Shimon ben Gamliel is referring to a gift which will not become evident.
Challenge: The gift of Shabbos became evident?
Resolution: Although we enjoy the Shabbos, its reward is unknowable [because it is the source of all blessings. See more in last week’s Toras Avigdor booklet here]. 
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