Why did the high priest have to make atonement for himself first?

In Leviticus 16, the high priest Aaron was instructed to make atonement for himself before he could atone for the people. This act served as a vital reminder that even the highest religious leaders are not exempt from sin and the need for purification. It reflects the biblical principle that no one can approach God without first addressing their own sin. This order is imperative because it underscores the holiness of God and the gravity of sin; all worship must be conducted with a recognition of one’s own unworthiness. In the New Testament context, this further illustrates the role of Christ, our ultimate high priest, who not only makes atonement for our sins but did so as the sinless Savior, fully accepting the responsibility on behalf of His people without any personal need for atonement. His embodiment of both perfect divinity and humanity ensures that His sacrifice is both effective and complete.