My favorite story about Yom Kippur involves a very famous rabbi who every year would disappear from the congregation, and the congregation believed that he ascended to heaven to argue for them. One Yom Kippur, a man who didn't believe the story decided to secretly follow the rabbi. The rabbi himself dressed as a peasant, went into the woods and chopped firewood, (btw, it is strictly forbidden on Yom Kippur to do such work) and then carried the wood to the home of a sick old woman who could not afford wood and built her a fire. When the man who had secretly followed the rabbi returned to the congregation and was asked if the rabbi had ascended to heaven, he replied, "The rabbi went even higher."
So for all those who believe and those who don't (like me), I nevertheless wish you the traditional greeting of this day: May you be written in the Book of Life.