The state of being unmixed, uncontaminated, and morally clean — conforming in heart, mind, and body to God's holy standard. Biblical purity is both positional (the purity imputed to believers through Christ's righteousness) and progressive (the ongoing sanctification of mind and body through the Spirit). Scripture addresses purity at multiple levels: ritual purity under the Old Covenant (clean/unclean distinctions pointing to holiness), moral purity (freedom from sexual immorality, covetousness, deceit), and heart purity — the inward cleanness Jesus commended: "Blessed are the pure in heart, for they shall see God" (Matt 5:8). Purity is not prudishness but wholeness — the alignment of the inner man with the character of God. The call to purity is inseparable from the call to holiness: "Without holiness no one will see the Lord" (Heb 12:14).
PU'RITY, n. 1. Clearness; freedom from foreign admixture or heterogeneous matter. 2. Freedom from guilt or the defilement of sin; innocence; as purity of heart or life. 3. Chastity; freedom from all unlawful commerce of sexes. 4. Freedom from any sinister or improper views; as purity of motives or intentions. 5. Freedom from barbarisms or improper phrases; as purity of style or language.
Modern culture treats sexual purity as oppressive mythology and heart purity as naive wishful thinking. The "sexual revolution" declared that any consensual act is morally neutral, demolishing millennia of Christian teaching on covenant sexuality. Meanwhile, the internet has weaponized impurity — pornography is now the dominant sexual educator for adolescents, habituating millions to lust and fantasy as normal. Progressive Christianity has largely capitulated, redefining purity as merely "relational honesty" rather than sexual holiness. The MOOP Dictionary holds the ancient line: purity is not repression — it is the protection of something sacred. The vessel that carries holy things must itself be clean.
Matthew 5:8 — "Blessed are the pure in heart, for they shall see God."
1 Thessalonians 4:3–4 — "This is the will of God, your sanctification; that is, that you abstain from sexual immorality; that each of you know how to possess his own vessel in sanctification and honor."
Philippians 4:8 — "Whatever is true, whatever is honorable, whatever is right, whatever is pure... dwell on these things."
1 John 3:3 — "Everyone who has this hope fixed on Him purifies himself, just as He is pure."
Psalm 51:10 — "Create in me a clean heart, O God, and renew a steadfast spirit within me."
G2513 — katharos — clean, pure, free from corrupt mixture; used of ceremonial, moral, and heart purity throughout NT
G53 — hagnos — pure, chaste, holy; specifically denoting moral purity and sexual integrity; root of hagios (holy)
H2889 — tahor — clean, pure, undefiled; used of ritual, moral, and divine purity in the OT; applied to the pure gold of the temple
• "Purity of heart is not innocence about evil — it is the refusal to consent to it. You can know darkness and still walk in light."
• "The man who pursues purity is not weak — he is exercising the most rigorous self-discipline known to man: mastery of his own desires."
• "A culture that mocks purity will eventually be consumed by the impurity it celebrates. Every civilization that has abandoned sexual holiness has decayed from within."