The priests' duties were not just about performing rituals, but about safeguarding the very access to God. What did these boundaries protect, and why were they so strictly enforced?
God established clear lines of authority and access within His tabernacle. The priests, led by Aaron and his sons, were entrusted with every aspect of service related to the altar of burnt offering and the sacred space within the veil. This wasn't just a job; it was a sacred trust. The phrase 'everything of the altar' points to the sacrificial duties, while 'within the veil' signifies the even holier tasks performed in the inner sanctuary. These were exclusive domains, meant only for those God had appointed. The stark warning against any 'outsider' intruding underscores the holiness of God and the seriousness of His appointed mediators.