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Why does the Torah (תורה) emphasize that Yitzchok was born from "Avrohom" and not "Avram"? The shiur develops a yesod that the name change signals the Jewish people's roots in universal mankind—Avrohom means "father of a multitude of nations." This genetic connection obligates every Jew to moral example and outreach, fulfilling the dual mandate we affirm daily in Shema: perfecting ourselves and inspiring the world to recognize God.
Rabbi Zweig opens with a textual question from Bereishis 25:19: "These are the descendants of Yitzchok ben Avrohom; Avrohom holid es Yitzchok." The verse seems redundant—if Yitzchok is already identified as the son of Avrohom, why add "Avrohom gave birth to Yitzchok"? Rashi (רש"י) explains that the extra phrase teaches that Yitzchok was born after Hashem (ה׳) changed Avram's name to Avrohom. But this too is puzzling, since the Torah (תורה) already told us explicitly in Parshas Lech Lecha that the name change preceded Yitzchok's birth. Why repeat information the reader already knows? Rabbi Zweig suggests that the Torah is conveying a profound message about Jewish identity and responsibility. The distinction between "Avram" (head of Aram, a specific nation) and "Avrohom" (Av Hamon Goyim, father of a multitude of nations) is not merely historical—it defines the essence of the Jewish people. By emphasizing that Yitzchok was born from Avrohom, not Avram, the Torah ensures that every Jew understands his roots: we descend from a father whose identity was tied not to one nation but to universal mankind. This is our spiritual DNA.
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Bereishis 25:19
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