καθαρός

clean, pure, unstained

Definition

The adjective καθαρός (katharos) primarily means 'clean' or 'pure.' It describes physical cleanliness, as in the clean linen used for Jesus' burial (Matthew 27:59). More significantly, it denotes ritual or ceremonial purity, such as the cleansing of cups (Matthew 23:26) or the body (Luke 11:41). In its deepest sense, it refers to moral and spiritual purity—freedom from guilt, sin, or corruption. This is seen in Jesus' promise that the pure in heart will see God (Matthew 5:8) and in His statement that His disciples are 'clean' because of His word (John 15:3).

Biblical Usage

Katharos is used across the Gospels, Acts, and the Epistles, often in contexts of spiritual condition. In John's Gospel, it is a key term in the Upper Room Discourse, distinguishing between physical washing and spiritual cleanness (John 13:10-11, 15:3). Matthew emphasizes inner purity versus external ritual (Matthew 5:8, 23:26). Paul uses it to declare his innocence (Acts 18:6). The usage consistently elevates the concept from the physical/ceremonial to the internal and spiritual realm.

Etymology

Derived from the Greek root καθαρός, meaning 'clean, pure, free from admixture.' It is related to the verb καθαρίζω (katharizō, G2511), 'to cleanse or purify.' The fundamental idea is of being unmixed, unalloyed, or free from contamination, whether physical, ritual, or ethical.

Semantic Range

This word is central to the biblical concept of holiness and access to God. Jesus redefines purity from an external, ritual observance to an internal condition of the heart (Matthew 5:8). Spiritual cleansing is directly tied to His word (John 15:3) and His sacrificial work. Understanding katharos enriches the reading of passages about sanctification, highlighting that true purity is a gift of grace that transforms one's inner being, making fellowship with God possible.

In first-century Jewish culture, purity (טָהוֹר, tahor) was a major concern governed by Mosaic Law, involving rituals for cleansing from physical or ceremonial defilement. Jesus' teachings, especially in Matthew 23 and John 13, challenged a system that often prioritized external ritual over internal moral integrity. His use of katharos shifted the focus from ceremonial observance to the state of the heart and relationship with Him.

ἅγιος (hagios, G40) — emphasizes being set apart or holy for God, whereas katharos focuses on cleanness from defilement. ἄμωμος (amōmos, G299) — means 'without blemish,' often used of sacrificial animals or moral blamelessness, overlapping with katharos in moral purity but with a stronger connotation of being unblemished.

Word Details

Scripture References