Everyone is in awe of Yom Kippur. People fast and afflict themselves, and they are careful to avoid the slightest transgression. Yet the kedusha of Shabbos does not affect them all that much. We are awed by Yom Kippur because it is a day on which Hashem forgives our sins. But we should realize that Shabbos affords forgiveness even more than Yom Kippur does. Indeed, for observing Shabbos, Hashem pardons all our sins.