Every high priest is a man chosen to represent other people in their dealings with God. He presents their gifts to God and offers sacrifices for their sins.
That is why Christ did not honor himself by assuming he could become High Priest. No, he was chosen by God, who said to him, "You are my Son. Today I have become your Father. "
While Jesus was here on earth, he offered prayers and pleadings, with a loud cry and tears, to the one who could rescue him from death. And God heard his prayers because of his deep reverence for God.
There is much more we would like to say about this, but it is difficult to explain, especially since you are spiritually dull and don't seem to listen.
You have been believers so long now that you ought to be teaching others. Instead, you need someone to teach you again the basic things about God's word. You are like babies who need milk and cannot eat solid food.