Meaning: sacred, pure and clean. The center of the whole book Leviticus points to holiness. For example, the vegetarian sacrifice in the sacrifice must use oil (vegetable oil), and its purpose is to isolate flour from pots or other substances; When anointing kings or sacrifices, they also anoint oil, and the anointed person is considered holy. Oil does have the function of isolation, so that many things can't be mixed together. Also, the treatment of moldy clothes is to separate things contaminated with mold from other things; If people suffer from leprosy or other infectious diseases, they also receive isolation treatment; There are also things that can't be eaten mentioned in the diet regulations, which also tells Israelis to stay away from harmful things. This is the meaning of "sanctification" in the Bible-to be (detached from) to be (become) holy (holy). Leviticus 20: 24, 26.