Va’Yeilekh: God’s final command to Moses, as conveyed in this week’s parashah, is “Write a [farewell] song to the people” (Deuteronomy 31:19). Songs are poems put to music. They have added power because music evokes and amplifies emotion. It also allows us to memorize. Hence, we learn the a,b,c’s and the aleph bet with a melody. Likewise, the power of Kol Nidre, which we…