"The Mesorah of the nefesh (soul), of experiencing God, is expressed in halachic terms by the Remo, who rules (אורח חיים תריט:א) that one may not alter the liturgy and tunes used by one’s congregation on the High Holidays. The liturgy and tunes employed by each community affect one’s emotional response to the High Holidays and constitute the Mesorah of the nefesh." Rabbi Joseph B. Soloveitchik
(A German-Jewish Chanukah in Upper Manhattan, Avraham Gordimer)