Leviticus is an ancient handbook on holiness, used by the priests in their Tabernacle duties. What health is to the body, holiness is to the soul.
The word “holy,” which means “separate, set apart, or consecrated,” appears eighty times in Leviticus, on average nearly three times per chapter. God’s holiness speaks of His separateness from anything impure or defiled. In Leviticus, not only are certain rituals and observations considered holy, but the Lord also calls His special people holy, requiring them to live separate and free from worldly defilements.
“For I am the Lord who brought you up out of the land of Egypt to be your God. You shall therefore be holy, for I am holy” (Leviticus 11:45).