Every chief priest is chosen from humans to represent them in front of God, that is, to offer gifts and sacrifices for sin.
The chief priest can be gentle with people who are ignorant and easily deceived, because he also has weaknesses.
Because he has weaknesses, he has to offer sacrifices for his own sins in the same way that he does for the sins of his people.
No one takes this honor for himself. Instead, God calls him as he called Aaron.
So Christ did not take the glory of being a chief priest for himself. Instead, the glory was given to him by God, who said, "You are my Son. Today I have become your Father."
In another place in Scripture, God said, "You are a priest forever, in the way Melchizedek was a priest."
During his life on earth, Jesus prayed to God, who could save him from death. He prayed and pleaded with loud crying and tears, and he was heard because of his devotion to God.
Although Jesus was the Son [of God], he learned to be obedient through his sufferings.