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Isaiah 57:5 meaning

Idolatrous practices in hidden places led the people away from God, demonstrating how grievous sin becomes when it is not confronted by genuine faith and repentance.

The prophet Isaiah rebukes the people of Israel in stark terms when he says, “Who inflame yourselves among the oaks, Under every luxuriant tree, Who slaughter the children in the ravines, Under the clefts of the crags?” (v.5). These strong words paint a picture of rampant idol worship in hidden places, where the people practice perverse rituals under the cover of dense woodlands. By mentioning “inflame yourselves among the oaks” (v.5), Isaiah underscores how the nation’s devotion to false gods had become passionate and unrestrained. The phrase “Under every luxuriant tree” (v.5) further highlights that their idolatrous ceremonies were widespread and took place in seemingly lush and private locations, far from public scrutiny. It connects to earlier warnings in Scripture where God decries the worship of pagan deities in high places and under leafy groves (2 Kings 17:10).

Isaiah, who lived and served as a prophet between approximately 740 and 681 BC, often addressed the moral and spiritual corruption of his time. When he refers to those “Who slaughter the children in the ravines, Under the clefts of the crags” (v.5), he evokes the horror of child sacrifices—a tragic practice linked to the worship of false gods like Molech (Leviticus 18:21). Geography plays a role here too, since ravines and rocky areas outside the main cities became places where such dreadful acts occurred in secret. In these clandestine settings, people believed they could appease or manipulate pagan deities through ruthless offerings, revealing how far the nation had drifted from the worship of the one true God.

New Testament believers see a stark contrast to these Old Testament idolatries in the life and teachings of Jesus, who offered Himself so that no further sacrifices would ever be necessary (Hebrews 10:12). The condemnation of child sacrifice in Isaiah 57:5 stands in direct opposition to Christ’s exhortation to protect and cherish children (Matthew 19:14). From the perspective of the attached reference materials, such devotions to false gods indicate a heart deeply alienated from the love and covenant of God, pointing to the grave consequences of forsaking the Lord’s commands.

Isaiah 57:5