Vayishma Yitro 5745 not edited by the Rebbe

This discourse was taught in the week of Parsha Yitro, which tells of Yitro coming to be with Moses and the Jewish people, and then of the Giving of the Torah. The Zohar links these two events. When Yitro, who knew every kind of idolatry and secular wisdom,  declared 'Now I know that G-d is greater than all other powers' this was a crucial step leading to the Giving of the Torah, joining the spiritual and the secular.