Because the day has passed, shield us by the merit of [the Patriarch Abraham] who sat [at the door of his tent] in the heat of the day [to welcome wayfarers] (Genesis 18:1) (Ne'ilah prayer).
Just prior to Ne'ilah (the concluding service of Yom Kippur), one of the Chassidic masters ascended the bimah (platform) and said tearfully, "My dear brothers and sisters! God in His infinite mercy gave us the entire month of Elul to repent, but we failed to take advantage of it. He gave us the awesome days of Rosh Hashanah, when our standing in judgment before the heavenly tribunal should have stimulated us to repent, but we neglected that opportunity. He gave us the special grace of the Ten Days of Penitence, but we let these pass too. All we have left now are a few precious moments that are propitious for forgiveness.
"The Sages of the Talmud tell us that if a person enters a marriage contract on the condition that he is a perfect tzaddik, then it is binding even if he is known to be a complete rasha (wicked person). Why? Because he may have had one moment of sincere contrition that transformed him from a complete rasha to a perfect tzaddik. "Do you hear that, my dear brothers and sisters? All it takes one brief moment of sincere contrition! We have the opportunity of that moment now. In just one moment we can emerge totally cleansed of all our sins, in a state of perfection akin to that of Adam in the Garden of Eden."
The rabbi wept profusely and uncontrollably. "Could we be so foolish as to overlook such a rare opportunity? Let us assist one another and join in achieving sincere repentance!"