How do we know that Jesus fulfills the role of high priest as seen in Joshua?

Joshua is more than just a leader; he is also portrayed as a high priest in the line of God's servants, which points to Jesus Christ, our eternal High Priest. In the Old Testament, high priests served to mediate between God and His people, but they themselves were frail and sinful. Jesus, being sinless and perfect, fulfills this role completely, as illustrated through the sacrificial system that culminates in His atoning work on the cross. The writer of Hebrews elaborates on this in Hebrews 4:14-16, inviting believers to approach the throne of grace boldly because we have a High Priest who empathizes with our weaknesses. Thus, Joshua's representation as a high priest serves as a shadow of the reality found in Christ, showcasing His mediatorial role in our salvation.