When Kol Nidre is sung on the eve of Yom Kippur, Jews everywhere are wrapped in spiritual emotion as they pray to be entered in the Book of Life. The chant of Kol Nidre captures this spirituality because, if the Jewish soul could be set to music, Kol Nidre would be the melody. These somber notes capture the pain of the Diaspora in a way that no words can express. Jewish tradition says that on the sacred eve of Yom Kippur you can hear the flutter of the wings of angels as they wait to be inscribed in the Book of Life. For angels, too, must appeal for judgment on Yom Kippur. Except for the murmur of angel wings, the congregation is silent as the cantor sings the stirring prayer of Kol Nidre.