A Comprehensive Cleansing
Commentators explain that this verse summarizes the all-encompassing nature of the Day of Atonement. Atonement wasn't just for the people; it was required for the Holy of Holies, the tabernacle, the altar, and the priests. This ritual demonstrates that sin's effects are pervasive, and God's provision for cleansing was meticulously complete, leaving no person or place untouched.