Clean and unclean: the Levitical laws

The passages

Two parallel passages give us the Levitical food laws: Leviticus 11 (the primary text) and Deuteronomy 14:3-21 (the abbreviated re-statement for the second generation). Both follow the same structure: clean and unclean animals from land, sea, and sky, with a final word on what to do if an unclean animal carcass touches something in the home.

The framing question is not arbitrary preference. Leviticus repeats the refrain be holy, for I the LORD am holy (Lev 11:44-45). Food was an everyday teaching aid in what it meant for Israel to be a peculiar people.

Land animals (Lev 11:2-8)

Clean: chews cud AND has split hooves.

The combination is the test. An animal that only has split hooves (pig) or only chews cud (camel, hare, rock badger) is unclean.

• ✅ Cattle, sheep, goats, deer, gazelle, ibex, antelope (Deut 14:4-5 expands the list)
• ❌ Pigs, camels, rabbits, rock badgers, horses, donkeys, dogs, cats, predators

Water creatures (Lev 11:9-12)

Clean: has fins AND scales.

Both tests must pass. This excludes a vast amount of marine life that the surrounding nations considered delicacies.

• ✅ Most fish — tuna, salmon, cod, tilapia, herring, sardines, trout
• ❌ Shellfish (shrimp, crab, lobster, oysters, clams, mussels), eel, catfish (no scales), sharks, rays, octopus, squid

Flying creatures (Lev 11:13-19, Deut 14:11-18)

Leviticus does not give a rule here — it gives a list of forbidden birds. The pattern within the list is that birds of prey, scavengers, and birds that eat carrion or other animals are unclean. Songbirds, poultry, and game birds are permitted.

• ✅ Chickens, turkeys, ducks, geese, doves, pigeons, quail, partridges
• ❌ Eagles, hawks, owls, vultures, ravens, kites, gulls, herons, storks, bats (listed with birds in the ancient classification)

Swarming things (Lev 11:20-23, 41-42)

Most insects are unclean, with one striking exception: jointed-leg leaping insects.

• ✅ Locusts, grasshoppers, crickets (John the Baptist's diet — Matt 3:4)
• ❌ All other insects, all "swarming things" that crawl on the ground

Touching carcasses (Lev 11:24-40)

The laws extend beyond eating to contact. Touching the carcass of an unclean animal made you ritually unclean until evening. A clay pot that an unclean animal fell into had to be broken. This is not modern germ theory — it is teaching that holiness is contagious in one direction and uncleanness in the other.

What the laws were for

Scholars and theologians have argued about this for two thousand years. The major proposals, none mutually exclusive:

1. Holiness and distinction (the surface reading) — Israel was to be visibly different from surrounding nations. Food at every meal reminded them.
2. Symbolic theology — clean animals tended to match the kind of life Israel was called to (orderly, productive, life-giving); unclean animals matched what scripture associates with chaos, predation, and death (Mary Douglas, Purity and Danger).
3. Public health — pork in a hot climate before refrigeration, shellfish filtering pollutants — though this was almost certainly not the primary intent, and scripture never argues from this angle.
4. Pedagogical — the laws teach discrimination as a habit. If you stop to think about what you eat three times a day, you build a discriminating conscience in other areas (Lev 11:44 explicitly draws this line).

What is not in the text: any suggestion that the laws make the animals themselves morally evil. Pigs are not sinful. They are simply not on Israel's menu.

What this means for us today

This is where the New Testament shift takes over. Mark 7:19 and Acts 10:9-16 explicitly release Christians from the Levitical food restrictions. Romans 14 and 1 Cor 8-10 govern how we live in a world where some still keep the laws and some do not.

But the theology the laws teach — that what enters the body matters, that mealtimes are formation moments, that discrimination at the table builds discrimination in the soul — does not expire.