They shall be holy unto their God. — This is the reason why the priests are not to disfigure themselves by maiming their outward appearance. Being sacred to the Lord, they are not to indulge in those outward manifestations of grief which would interfere with the discharge of their sacred duties, and thus cause the name of God to be profaned.
The offerings of the Lord made by fire, and the bread of their God. — Better, the offerings of the Lord made by fire, being the food of God. As the altar was the table, the sacrifice burnt on it was called His food. (See Leviticus 3:11.)