What does the Bible say about the role of a high priest?

In scripture, the role of the high priest, as exemplified in Aaron, involves ministering to God on behalf of the people by offering sacrifices. This office is crucial because it not only symbolizes the intercession of Christ but also points to the need for a mediator between God and humanity. The high priest must be chosen by God, as Aaron was, showcasing that true priesthood originates from divine appointment. This concept culminates in Christ, our great high priest, who fulfills these roles perfectly by offering Himself as the ultimate sacrifice for sin.