For this reason he had to be made like his brothers in every way, in order that he might become a merciful and faithful high priest in service to God, and that he might make atonement for the sins of the people.
This passage in Hebrews explains one of the reasons that Jesus became a man. There is an old adage that says, “Don’t judge a man until you’ve walked a mile in his shoes.” In other words, don’t jump to conclusions about a person until you know what they’ve been through.
Jesus walked among us as a man and experienced life here on earth. No one can ever argue with God by saying, “You don’t know what it’s like.” Jesus was here and he does know what it is like.
Jesus was tempted in every way that we are tempted. He experienced greater rejection than we will experience. He was persecuted to the point of death. Jesus tasted the worst that life had to offer so He knows how we feel when we cry out to Him.
Because of these things Jesus is merciful to us. He lived the sinless life that we’re incapable of living but He knows firsthand how hard it is to live it. He does not want to punish us for falling short but to give us mercy instead.
The job of the high priest was to present the sacrifice to God. Because Jesus was a merciful and faithful high priest He offered up Himself as a sacrifice for us. Jesus walked in our shoes and knew that we needed mercy. He gave us that on the cross.