Biblical Purity, Defilement, and Cleansing Through Christ

Summary

The Bible presents defilement as impurity that separates people from God, His people, and His purposes. In the Old Testament, defilement often involved external actions, idolatry, immoral practices, and ritual uncleanness. Jesus revealed that true defilement comes from the heart. Through His death and resurrection, He provides the permanent cleansing sinners need to be made pure before God.

Americans who were on the cruise ship where the hantavirus infection surfaced in the spring of 2026 were quarantined in Nebraska to prevent the spread of the disease. Old Testament defilement laws forced a similar separation from others in the community.

Defining Biblical Purity

Biblical defilement is spiritual impurity, the opposite of holiness. Because God is holy, He is set apart from evil and sin. Holy people are set apart to God and His purposes. They are in His army and are under His command. They deny self-rule and embrace God’s rule, with Him as the focus of their lives.

In the Old Testament, we read about restrictions on certain behaviors that might seem strange to us today. For example, because priests were holy to the Lord, they could not marry a widow, prostitute, or divorced woman (Leviticus 21:14). Disobedience caused defilement, disqualifying people from fellowship with God and the community.

God’s People Were Called to Be Set Apart

God’s people were not to live as everyone else did. They were a set-apart people showcasing what it meant to live for God. They could touch or eat only animals and birds that God designated as clean (Leviticus 11:43, Leviticus 20:25). Eating impure meat would defile them (Ezekiel 4:14). Daniel resolved not to eat food that God had forbidden (Daniel 1:8).

External Sources of Defilement in the Old Testament

In the Old Testament, defilement is often linked to external sources. Because Dinah was raped, in Jacob’s eyes, she was no longer pure, because she had sexual relations with an outsider (Genesis 34:5).

Reuben lost the privileges of being the firstborn in the family because he defiled Jacob’s bed and made it impure by having sexual relations with Bilhah, his father’s servant wife (Genesis 49:4).

Adultery rendered people impure (Leviticus 18:20) as did sexual relations with animals (Leviticus 18:23), consulting with mediums and spiritists (Leviticus 19:31), skin diseases, and bodily discharges (Leviticus 22:4).

Sinful Influence Defiled God’s People

God warned the Israelites that living like the sinful people who occupied the land before them would defile them (Leviticus 18:30). Nevertheless, that is precisely what happened. They allowed the wrong people to influence them. They imitated those who didn’t worship or serve God (Ezekiel 23:30).

Their sinful behavior defiled both them (Psalm 106:39) and their land (Ezekiel 36:17, Ezekiel 36:18). Worshipping other gods was frequently described as a cause of their defilement (Ezekiel 20:18, Ezekiel 22:3, etc.).

Idolatry Polluted the Land

Worshipping idols (Jeremiah 2:23) defiled the land in which they took place (Leviticus 18:25, Isaiah 24:5, Jeremiah 3:2), teaching us that rebellious acts contrary to God’s will defile the land where sinners dwell and make it detestable to Him (Jeremiah 2:7).

God Provided a Way to Remove Defilement

God provided a way to remove the defilement, but it had to be applied to be effective. Those who didn’t purify themselves with the water of cleansing God provided were to be cut off from the community (Numbers 19:20). The Israelites not only forgot about God’s remedy but also about Him and the way He told them to live.

Defilement Led to Exile

Persisting in multi-faceted sinful behavior resulted in God separating the Israelites from the land He had promised them (Leviticus 18:28). The people of the northern kingdom of Israel were exiled by the Assyrians in 722 B.C., and Judah by the Babylonians in 586 B.C.

God Promised Future Cleansing

God promised that in the future His people would no longer defile themselves by their sinful practices because He would save them from their backsliding and cleanse them (Ezekiel 37:23).

Jesus Revealed the Heart of Defilement

Jesus provided insight into the cause of impurity, shifting the focus from outward things to matters of the heart. Many of the religious leaders of His day were religious giants but spiritual midgets, who valued religious rituals that impressed others over spiritual purity. They looked good on the outside, but were filled with every kind of impurity on the inside (Matthew 23:27). Purity is always a matter of the heart. 

Jesus said that what enters the mouth doesn’t defile, or eating with unwashed hands (Matthew 15:20), but what exits the mouth does because it comes from a defiled heart (Matthew 15:11, Matthew 15:18), the source of “murder, adultery, sexual immorality, theft, false testimony, and slander” (Matthew 15:19).

God Provided a Temporary Covering

In the Old Testament, God provided animal sacrifices and the water of cleansing to cover the people’s impurity as a temporary solution. Jesus, His Son, became a human being to provide a permanent solution.

Jesus died on Calvary’s cross, the righteous for the unrighteous (the pure for the impure), to pay the penalty for humanity’s overflowing sewers of impurity (1 Peter 3:18). His purity is credited to the accounts of all who believe in Him (2 Corinthians 5:21, Philippians 3:9).

Jesus Offers Permanent Purity

Those who repent and trust Jesus’ sacrificial death as payment in full for their sins become as pure as Jesus in God’s sight, with clean hearts.

Those who reject Jesus’ death, burial, and resurrection, God’s only provision for their sins, will be condemned and separated forever from God and the community of people who trust that provision (John 3:18) because they love their impurity more than the purity Jesus freely offers to them as a gift (John 3:19).

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