How do we know that Jesus' priesthood is superior?

The superiority of Jesus' priesthood is established in Hebrews 7, where it is stated that He is a priest after the order of Melchizedek, possessing an indestructible life. Unlike the Levitical priests who were appointed based on descent and were subject to death, Jesus transcends these limitations. His priesthood is permanent and established by God's oath, making Him the guarantor of a better covenant. This ensures that His ability to intercede and save is complete and eternal, fulfilling the needs of His people perfectly and forever.