Shared ground
Leviticus 18:21–23 presents three practices as defiling and out of bounds for Israel within a chapter aimed at separating Israel from surrounding worship and sexual customs (Leviticus 18:1–5). The passage links behavior to communal holiness: certain actions are not treated as merely private choices but as acts that dishonor God and pollute the people.
The text makes a clear connection between idolatrous ritual and God’s reputation: participating in a Molech rite is described as “profaning” God’s name (treating it as ordinary). It also treats certain sexual acts as violations that bring “defilement,” using strong evaluative terms (“abomination,” “confusion”).
Where interpretation differs
Some differences center on what exactly is being prohibited in each line.
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The Molech rite (“make them pass through [the fire]”): Many read this as child sacrifice or a rite that seriously endangers children, because “fire” is implied and the context emphasizes severe defilement. Others argue it could refer to a different form of dedication rite involving fire without necessarily implying death, though still seen as illicit worship.
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“Of your seed”: Some take this as “your children/offspring” in general. Others argue it could be narrower (for example, a particular child or lineage emphasis), but the practical sense remains “your own offspring” involved in the rite.
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Male-with-male intercourse (“as with a woman”): Some interpret the phrase as a broad ban on male–male sexual intercourse. Others argue it targets a more specific act (for example, intercourse modeled on male–female intercourse) and debate whether the verse addresses all forms of male–male sexual behavior or a subset.
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How “abomination” functions: Some read the label as mainly a ritual-category judgment (what is unacceptable within Israel’s holiness code). Others read it as a direct moral evaluation that also carries ritual implications. Many combine these, noting that in Leviticus ritual and moral concerns often overlap.
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“Confusion” (sex with animals): Some understand it as “category mixing” (a boundary-violation between human and animal). Others emphasize the social and moral disorder such acts create. Either way, the text frames it as fundamentally disordered and defiling.
Why the disagreement exists
The disagreements mostly come from the brevity of the wording and the way ancient Hebrew idioms work. Phrases like “make them pass through” and “as with a woman” rely on shared cultural knowledge that is not fully explained in the verse itself. Also, words like “abomination” can function as both a strong moral term and a holiness-category term, and interpreters weigh those possibilities differently.
What this passage clearly contributes
Explicitly, the passage forbids (1) involving one’s offspring in a Molech fire-rite, (2) a man having sex with a male “as with a woman,” and (3) sex with animals (addressed to both men and women). It portrays these acts as defiling and as dishonoring to God’s name, closing v.21 with God’s identity (“I am Yahweh”) to ground the authority behind the prohibitions. The chapter’s broader frame is that Israel’s distinct way of life includes both worship loyalty and sexual boundaries, and violations are portrayed as contaminating, not neutral.