Leah's Gratitude and the Essence of Prayer in Creation

Rabbi Zweig opens with a striking question from Parshas Vayeitzei: Why did Leah only express gratitude to Hashem (ה׳) after her fourth child, saying "This time I will thank God" and naming him Yehuda? Rashi (רש"י) explains that Leah knew there would be twelve tribes divided among four wives—three children each—so when she had a fourth, she recognized she had received more than her "share." The Gemara (גמרא) states that Leah was the first person from Creation to thank Hashem. But this seems impossible—what about Noach building altars after the flood, or Avrohom's altars, or Eliezer saying "Baruch Hashem"? And why did a barren woman whose every pregnancy was miraculous need four children before expressing gratitude? The answer lies in understanding what true gratitude means. The shiur develops a fundamental principle through Rashi in Bereishis: On the third day of Creation, Hashem created all vegetation, but kept it just beneath the earth's surface until the sixth day when Adam was created. Only after Adam prayed for rain did Hashem bring forth the vegetation. Why? Because Hashem wanted a human being who would recognize the goodness of rain—someone who would see that Hashem was doing something for him personally and relationally, not just mechanistically providing sustenance.