כי ביום הזה יכפר עליכם לטהר אתכם מכל חטאתיכם לפני ד' תטהרו
In Pachad Yitzchak, Yom Kippur 1, Horav Yitzchak Hutner, zl, cites Rabbeinu Yonah (Shaar 2:14) who writes: “It is a positive mitzvah of the Torah for a person to awaken his spirit to return/perform teshuvah on Yom Kippur.” He quotes the above pasuk which intimates that it is a specific mitzvah to perform teshuvah on Yom Kippur (exclusive of the mitzvah to repent from one’s sins at all times). The Rosh Yeshivah wonders wherein lies the difference between teshuvah all year and teshuvah on Yom Kippur. He explains that the mitzvah to repent all year/all of the time, whenever one…