God Bestowed the Honor of High Priest on Jesus (Hebrews 5:4-5)
“No one takes this honor upon himself; he must be called by God, just as Aaron was. So Christ also did not take upon himself the glory of becoming a high priest. But God said to him, “You are my Son; today I have become your Father” (Hebrews 5:4-5)
Jesus did not exalt himself to the position of High Priest, even though He was the only one qualified who could have easily assumed the role. Instead God appointed Him this honor. Since the introduction of the High Priest, it was God who chose who would serve at the altar. He chose Aaron and gave instruction that every high priest would be his descendant (Exodus 29:9). Aaron wasn't qualified when God chose him, having served as a slave in Egypt his entire life. Nevertheless, God chose and equipped him to intercede on Israel's behalf.