Lecture to Chabad Mainline/Likkutei Sichos Yisro: A segment of a lecture deliveredby Rabbi YY Jacobson to the Jewish community of Mainline, Pa. on Monday, 19 Shevat, 5781, February1, 2021. The evening, arranged by Chabad of the Mainline, was led by the Chabad Shluchim to the region, Rabbis Shraga Sherman, Boruch Sholom Davidson, and Mendel Cohen. This lecture is basedon an address by the Lubavitcher Rebbe, 15 Shevat 5735(January 27,1975), published in Likkutei Sichos vol. 16, Parshas Yisro.