“No civil court of law would change its verdict and, after finishing the trial, decide to give a convicted criminal another chance! Imagine hearing, “You’re convicted, but we’re giving you another ten days to repair the damage you’ve done. At the end of those ten days, you’ll have a new trial. Good luck!”  What a golden opportunity!   

But that’s exactly what happens on Yom Kippur. Hashem judges us on Rosh Hashana, ~passes a verdict, and then gives us another opportunity, a new trial, ten days later!” – R” Shalom Arush

G’mar Chasima Tovah!