Why is understanding Christ's priesthood important for Christians?

Hebrews 4 speaks extensively about Christ as our high priest, emphasizing that He is intimately acquainted with our weaknesses and yet without sin. This priesthood establishes a direct line of communication between believers and God, eliminating the need for a human intermediary. The importance of Christ's priesthood lies in the assurance that we can approach the throne of grace with confidence, knowing that His atoning sacrifice is fully sufficient for our sins. It instills a sense of comfort and security, knowing that our needs are met through our relationship with Jesus, who is our mediator.