The most powerful day[1]
כי-ביום הזה יכפר עליכם לטהר אתכם מכל חטאתיכם לפני יקוק תטהרו
For on this day [of Yom Kippur] it shall be atoned for you, to purify you, from all of your sins; purify yourselves before Hashem![2]
Yom Kippur is one of the most intense days of the year. We spend the entire day involved in prayers and supplications. We fast, and refrain from physical pleasures. We (hopefully) perform teshuvah, repentance with sincerity and a broken heart. With this, we hope to repair the damage we inflicted to our relationship with our Creator. After all of this, a person may wonder: How can I know that my repentance was accepted?