How does the blessing from the high priest in the Old Testament relate to that of the New Testament?
In the New Testament, the greatest blessing that believers received from the Lord is salvation through Christ Jesus. He is the only Mediator between God and man. As the great high priest, Jesus entered the presence of God the Father in heaven in order to make intercession on our behalf.
23 And Moses and Aaron went into the tent of meeting, and when they came out they blessed the people, and the glory of the LORD appeared to all the people.