σής

a moth

Definition

The Greek word σής refers to a moth, specifically a clothes moth or woodworm that consumes and destroys organic materials like fabric, wool, or wood. In the New Testament, it is used exclusively in a metaphorical sense to describe the destructive, corrupting nature of earthly treasures that are vulnerable to decay. Jesus employs this imagery in Matthew 6:19-20 and Luke 12:33 to contrast earthly wealth, which 'moth and rust destroy,' with heavenly treasures that are imperishable. The word emphasizes the inevitable perishability of material possessions when stored on earth.

Biblical Usage

This word is used three times in the New Testament, all within Jesus' teachings on wealth and priorities. It appears in parallel passages in Matthew 6:19-20 and Luke 12:33, where Jesus warns against storing up treasures on earth because they are susceptible to destruction by moths. The usage is consistently metaphorical, illustrating the fragility and temporary nature of earthly possessions compared to eternal, heavenly treasures. No literal references to moths occur; the term serves as a vivid symbol of decay.

Etymology

Derived from the ancient Greek noun σής, which directly means 'moth' or 'woodworm.' It is a primary word with no clear earlier Indo-European root attested in surviving texts. The term was used in classical Greek literature (e.g., in Aristotle) to describe insects that consume clothes and stored goods. Its meaning remained stable into Koine Greek, retaining its core sense of a destructive, consuming insect.

Semantic Range

Theologically, σής is significant in teachings about materialism, stewardship, and eternity. Jesus uses the moth as a powerful metaphor for the inherent corruptibility of earthly wealth, urging followers to prioritize spiritual, eternal treasures in heaven (Matthew 6:20). This reinforces doctrines on God's provision, the folly of anxiety over possessions, and the call to live with an eternal perspective. Understanding this Greek term enriches reading by highlighting the vivid, everyday imagery Jesus chose to contrast the temporary with the permanent.

In the ancient Mediterranean world, moths and woodworms were a common threat to personal wealth, as clothing (often made of expensive wool or linen) and wooden storage items were vulnerable to infestation. Unlike modern pest control, people had limited means to protect these goods long-term. Jesus' audience would have immediately understood the moth as an agent of inevitable, gradual ruin, making it an effective symbol for the insecurity of material possessions stored on earth.

βρῶσις (brōsis, G1035) — 'eating' or 'rust,' often paired with σής in Matthew 6:19-20 to denote general decay or corrosion. σκώληξ (skōlēx, G4663) — 'worm,' another agent of decay, used in contexts of death and corruption (e.g., Mark 9:48).

Word Details

Scripture References