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Leviticus 18

Leviticus 18 is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Leviticus 18 rather than just read about it. In short: Leviticus 18 (the eighteenth chapter of the Book of Leviticus) deals with a number of sexual activities considered abominable, including incest and bestiality. The chapter also condemns Moloch worship.

Leviticus 18 — main illustration
Leviticus 18 — illustration

Key takeaways

  • Leviticus 18 belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Leviticus 18 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Leviticus 18 from memory before moving on to harder problems.

Reference excerpt

Leviticus 18 (the eighteenth chapter of the Book of Leviticus) deals with a number of sexual activities considered abominable, including incest and bestiality. The chapter also condemns Moloch worship. It is part of the Holiness Code (Leviticus 17–26), and its sexual prohibitions are largely paralleled by Leviticus 20, except that chapter 20 has more emphasis on punishment. Leviticus 18:22 has traditionally been interpreted as prohibiting homosexual acts, but its meaning is debated, with some scholars suggesting it applies only to specific contexts like adultery, rape, or incest and others arguing it evolved over time.

Text

The original text of Leviticus 18, like that of most of the Hebrew Bible, is written in Hebrew. The oldest extant versions of the text in Hebrew are found in the Dead Sea Scrolls, the Samaritan Pentateuch, and the Masoretic Text. An ancient Greek translation from the third century BCE, the Septuagint, also exists. Since the addition of chapter divisions in the thirteenth century CE, this chapter is divided into 30 verses. The chapter begins with God speaking to Moses (verse 1) and giving him a message for the Israelites (2), warning them to keep God's laws rather than Canaanite or Egyptian practices (3–5). Then God is quoted as listing people with whom sex is forbidden due to family relationships (6–19). In verse 20, God prohibits sexual relations with a neighbor's wife, and in verse 21 God prohibits passing one's children through fire to Moloch. Verse 22 is the famous verse about "lie with a man," discussed below, while in verse 23 God forbids bestiality, and, according to some translations, pedophilia. In the final verses (24–30), God warns that breaking these laws will produce defilement and that the Canaanites are about to be displaced from the land of Canaan as a result of following these practices, and warn of a similar fate for the Israelites if they fall into these practices.

Incest

The Bible lists several types of relationship which it regards as incestuous unions; one list appears in the Deuteronomic Code, and two lists occur in the Holiness Code of Leviticus. These lists only mention relationships with female relatives; excluding lesbianism, which implies that the list is addressed to men. These lists then compare as follows:

One feature of all the lists is that sexual activity between a man and his daughter is not explicitly forbidden. The Talmud argues that this is because the prohibition was obvious, especially given the proscription against a relationship with a granddaughter. The shortness of the list in Leviticus 20, and especially of that in Deuteronomy, is explained by classical Jewish scholarship as being due to the obviousness of the missing prohibitions. The explicit prohibition against engaging in sexual activity with "both a woman and her daughter" implicitly forbids sexual activity between a man and his daughter, as does the prohibition against engaging in sexual activity with "any that is near of kin". Some biblical scholars have instead proposed that it was originally in the list but was then accidentally left out from the copy on which modern versions of the text ultimately depend, due to a mistake by the scribe. However, most tribal nations also disliked exogamous marriage to completely unrelated people. In several prominent cases in the Torah, incestuous relationships are described. In the biblical narrative, each of these occurred chronologically prior to the establishment of Levitical law. Abraham married his half-sister Sarah, Jacob married his first wife's sister (albeit without his knowledge), and Amram married his paternal aunt Jochebed. Apart from the questionable case of a man marrying his daughter, the list in Leviticus 18 roughly produces the same rules as were followed in early pre-Islamic Arabic culture.

Homosexuality

Leviticus 18:22 in the Hebrew Bible:

וְאֶ֨ת־זָכָ֔ר לֹ֥א תִשְׁכַּ֖ב מִשְׁכְּבֵ֣י אִשָּׁ֑ה תּֽוֹעֵבָ֖ה הִֽוא: A word-by-word analysis of the WLC Hebrew text of Leviticus 18:22:

Leviticus 18:22 has been translated in common English versions as:

Thou shalt not lie with mankind, as with womankind: it is abomination. Do not lie with a male as one lies with a woman; it is an abhorrence. You shall not lie with a male as with a woman; it is an abomination. You shall not lie with a male as with a woman; such a thing is an abomination. Do not practice homosexuality, having sex with another man as with a woman. It is a detestable sin. The Hebrew wording of Leviticus 18:22 has been traditionally interpreted as prohibiting some or all homosexual acts, although which precise acts, and in which situations, is a matter of ongoing scholarly debate. Some authors state that verse 22 condemns "homosexuality" or "homosexual relations", with other authors maintaining that it condemns only males penetrating males (anal intercourse). Others believe due to study of the language used in the original Hebrew, that the restriction is only relevant in specific situations (in the context idolatry, religious sacrifice or various forms of rape which were common Canaanite or Egyptian practices), and specifically does not apply to modern homosexual relationships. Some researchers speculate that the contents of the text changed over time, where earlier examples would only admonish homosexual incest, and not homosexuality, more broadly in line with surrounding attitudes at the time. Such readings have also been responded to and countered in research. Lesbianism is not explicitly prohibited in the Torah; however, the rabbi and Jewish scholar Maimonides ruled that lesbianism was prohibited nonetheless as an "Egyptian practice" and deserving of punishment by beating.

Weekly Torah portion The whole chapter is part of the weekly Torah portion (parashah) Acharei Mot (אַחֲרֵי מוֹת) which comprises Leviticus 17:1–18:30.

Notes

References

… excerpt ends here. Continue reading the full article.

Illustrations

Leviticus 18 illustration

Worked examples

Example 1 — a first encounter with Leviticus 18

Start with the simplest possible case. Write down what Leviticus 18 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Leviticus 18 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Leviticus 18 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Leviticus 18

In research
Leviticus 18 appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Leviticus 18 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Leviticus 18 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bible-related controversies, Book of Leviticus, Incest, so understanding it makes those chapters shorter.
In everyday life
Look for Leviticus 18 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Leviticus 18 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Leviticus 18 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Leviticus 18 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Leviticus 18 in simple terms?

Leviticus 18 (the eighteenth chapter of the Book of Leviticus) deals with a number of sexual activities considered abominable, including incest and bestiality. The chapter also condemns Moloch worship.

Why does Leviticus 18 matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Leviticus 18?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Leviticus 18.

Tags

  • Bible-related controversies
  • Book of Leviticus
  • Incest
  • Jewish marital law
  • Judaism-related controversies
  • LGBTQ-related controversies in literature
  • LGBTQ and Christianity
  • LGBTQ and Judaism
  • Male homosexuality
  • Sexuality in the Bible
  • Zoophilia

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