Sacrifice and ritual Many scholars argue that the rituals of Leviticus have a theological meaning concerning Israel's relationship with its God.
Jacob Milgrom was especially influential in spreading this view. He maintained that the priestly regulations in Leviticus expressed a rational system of theological thought. The writers expected them to be put into practice in Israel's temple, so the rituals would express this theology as well, as well as ethical concern for the poor. Milgrom also argued that the book's purity regulations (chapters 11–15) have a basis in ethical thinking. Many other interpreters have followed Milgrom in exploring the theological and ethical implications of Leviticus's regulations (e.g., Marx, Balentine), though some have questioned how systematic they really are. Ritual, therefore, is not taking a series of actions for their own sake, but a means of maintaining the relationship between God, humanity, and the world.
Kehuna (Jewish priesthood) The main function of the priests is service at the altar, and only the sons of
Aaron are priests in the full sense. (Ezekiel also distinguishes between altar-priests and lower Levites, but in Ezekiel the altar-priests are sons of Zadok instead of sons of Aaron; many scholars see this as a remnant of struggles between different priestly factions in First Temple times, finding resolution by the Second Temple into a hierarchy of Aaronite altar-priests and lower-level Levites, including singers, gatekeepers and the like.) In chapter 10, God kills
Nadab and Abihu, the oldest sons of Aaron, for offering "strange incense". Aaron has two sons left. Commentators have read various messages in the incident: a reflection of struggles between priestly factions in the post-Exilic period (Gerstenberger); or a warning against offering incense outside the Temple, where there might be the risk of invoking strange gods (Milgrom). In any case, there has been a pollution of the sanctuary by the bodies of the two dead priests, leading into the next theme, holiness.
Uncleanliness and purity Ritual purity is essential for an Israelite to be able to approach Yahweh and remain part of the community. chapters 11–15 review the various causes of uncleanliness and describe the rituals which will restore cleanliness; one is to maintain cleanliness through observation of the rules on sexual behaviour, family relations, land ownership, worship, sacrifice, and observance of holy days.
Yahweh dwells with Israel in the
Tabernacle. All of the priestly ritual focuses on Yahweh and the construction and maintenance of a holy space, but sin generates impurity, as do everyday events such as childbirth and
menstruation; impurity pollutes the holy dwelling place. Failure to purify the sacred space ritually could result in God's leaving, which would be disastrous.
Infectious diseases in chapter 13 In chapter 13, God instructs Moses and Aaron on how to identify infectious diseases and deal with them accordingly. The translators and interpreters of the Hebrew Bible in various languages have never reached a consensus on these infectious diseases, or (), and the translation and interpretation of the scriptures are not known for certain. The most common translation is that these infectious diseases are
leprosy; however, what is described in chapter 13 does not represent a typical manifestation of leprosy. Modern dermatology shows that many of the infectious diseases in chapter 13 were likely
dermatophytoses, a group of highly contagious skin diseases. The infectious disease of the chin described in verses 29–37 seems to be
Tinea barbae in men or
Tinea faciei in women; the infectious disease described in verses 29–37 (as resulting in hair loss and eventual baldness) seems to be
Tinea capitis (
Favus). Verses 1–17 seem to describe
Tinea corporis. The Hebrew word in verses 38–39 is translated as '
tetter' or '
freckles', is likely to be
pityriasis versicolor (tinea versicolor). In addition, verses 18–23 describe infections after
scald, and verses 24–28 describe infections after
burn.
Atonement '' (1854 painting by
William Holman Hunt) Through sacrifice, the priest "makes atonement" for sin and the offeror receives forgiveness (but only if Yahweh accepts the sacrifice). Atonement rituals involve the pouring or sprinkling of blood as the symbol of the life of the victim: the blood has the power to wipe out or absorb the sin. The two-part division of the book structurally reflects the role of atonement: chapters 1–16 call for the establishment of the institution for atonement, and chapters 17–27 call for the life of the atoned community in holiness.
Holiness The consistent theme of chapters 17–26 is in the repetition of the phrase, "Be holy, for I the Lord your God am holy." Specific objects, or even days, can be holy, but they derive holiness from being connected with Yahweh—the seventh day, the tabernacle, and the priests all derive their holiness from him. As a result, Israel had to maintain its own holiness in order to live safely alongside God. The need for holiness is for the possession of the Promised Land (
Canaan), where the Jews will become a holy people: "You shall not do as they do in the land of Egypt where you dwelt, and you shall not do as they do in the land of Canaan to which I am bringing you[...] You shall do my ordinances and keep my statutes[...] I am the Lord, your God." (Leviticus 18:3). == Subsequent tradition ==