Jesus is no Aaronic priest. His priesthood is of a different order, that of Melchizedek. Several important things separate this priesthood from the Aaronic, but the big one is that Jesus, the final High Priest, is able to save eternally and completely those who come to God through him.
Who is the High Priest and what does he do? How is this related to Jesus Christ? As we begin to better understand the role of the High Priest we will be in a better position as Christians to understand who Jesus is and what he has done for us.
When Israel murmured against God about going back to Egypt God sent the symbol of Egypt (“fiery” serpent) to curse and remind them that there is no protection or salvation in Egypt. But all of this was just pointing to something greater, namely, The Curse that was lifted up on a pole at Golgotha named Jesus.