The Midrash (Midrash Tehillim, 92) relates that Adam and Hava committed their sin of partaking from the forbidden tree late on Ereb Shabbat, and then, when Shabbat began, G-d was going to punish them. He had warned Adam when He first placed him in Gan Eden that eating the forbidden fruit would be punishable by death (Bereshit 2:17 ), and so now that Adam violated this command, G-d was prepared to kill him. But then Shabbat came before Hashem to advocate on Adam's behalf. Shabbat pleaded, "Master of the world! During the six days of the week, no person in the world was punished. And You're going to begin [punishing] with me? This is my sanctity?! This is my rest?!" Hashem accepted Shabbat's plea, and let Adam and Hava live. The Midrash concludes that once Adam realized that his life was saved because of Shabbat, he composed a special song for Shabbat. This song is known to us as "Mizmor Shir Le'yom Ha'Shabbat," the 92 nd chapter of Tehillim, which we – and many communities – have the custom of reciting at the onset of Shabbat. Just as Shabbat served as Adam's advocate, saving his life, it serves as our greatest advocate, as well. The Maggid of Duvna (Rav Yaakov Kranz, 1741-1804) drew an analogy to a king who had a brilliant, beautiful daughter whom he loved and cherished more than anything in the world. He held her in very high esteem, and would occasionally consult with her on important matters. He treated her like a queen. One day, she got married and moved away. Sometime later, the king went to visit his daughter. He was stunned to see her face bruised and scarred. He realized that her husband had been beating her. The king turned to her husband and reminded him of his criminal past. He explained that he had decided to pardon him for his past misdeeds because he trusted that he would care for the king's beloved daughter. But now that he was mistreating the princess, he lost the king's favor. Shabbat, the Maggid of Duvna explained, is Hashem's beloved "princess." As long as we properly treat the princess, and observe Shabbat the way it is meant to be observed, we earn Hashem's favor and grace. Although we might occasionally err and stumble, Shabbat will advocate on our behalf before G-d, and save us from punishment. How does this work? Why does Shabbat serve as our advocate? One explanation emerges from a fascinating teaching in the Gemara (Shabbat 119b) about the recitation of the verses of "Va'yechulu" on Friday night. These verses tell of the conclusion of the world's creation after six days, and the designation of Shabbat as a special, sacred day (Bereshit 2:1-3). The Gemara states that one who recites these verses as part of his prayers on Friday "becomes G-d's partner in the creation of the world." Through the proper observance of Shabbat, we become Hashem's "partners." We might suggest a comparison to a fellow who opens and runs a store, but needs a partner to promote the store and bring in customers. A store won't be profitable without customers, and so both partners are indispensable to the success of the enterprise. Likewise, Hashem created and runs the world, but nobody knows about it. We become His partners by observing Shabbat, through which we announce that He created the world, we publicize Hashem's "enterprise," so-to-speak. And once we've become Hashem's partners, we become indispensable. Shabbat advocates on our behalf because through our commitment to Shabbat, we show that we are needed in order to disseminate the faith in Hashem throughout the world. Just as Shabbat protected Adam and Hava, it can protect us, as well. By reaffirming our devotion to proper Shabbat observance, by treating it with the respect and reverence that it deserves, we become worthy of Hashem's special care and grace, and elevate ourselves to the status of His partners.