Leviticus 9:8 Aaron therefore went unto the altar, and slew the calf of the sin offering, which was for himself.
Though Aaron was the chosen man of God he had to sacrifice to atone for his own sins before he ever thought of working with the people. Preachers, pastors, missionaries, deacons, etc are all people. We all sin. We all fail God. We all depend on what Jesus did for us on the cross.
Jesus is the only one that didn’t have to make a sacrifice for His sin. Jesus was and is the sinless Son of God. We run to Him because He is able to forgive us our sin. He is able to make us whole again.
Never forget to take care of yourself personally in your relationship to God before you try ministering to God’s people. We are just needy people helping other needy people!