How do we know Jesus is qualified to be our High Priest?

Hebrews 5 establishes the foundation of Christ's priesthood by reminding readers that He was divinely appointed. Unlike the priests from the lineage of Aaron, Jesus comes from the tribe of Judah, fulfilling the prophetic declaration of being a priest after the order of Melchizedek. His qualifications include being fully human, experiencing our trials and temptations, and thus being able to sympathize with us in our weaknesses. Moreover, He lived a life without sin, offering Himself as a singular perfect sacrifice that the Old Testament sacrifices could not achieve. His role as High Priest is fortified by His obedience to God's will, culminating in His death and resurrection, whereby He becomes the author of eternal salvation for all who believe.