### Core Meaning & Semantic Range
The Greek word **kléptēs**, represented by `{{G2812}}`, defines a **stealer** or **thief**. It is derived from the verb κλέπτω (to steal) and appears **16 times** across **16 unique verses** in the Bible. This term is used both for a literal thief who steals possessions and figuratively for those who bring spiritual harm or arrive unexpectedly. Scripture contrasts it with `{{G3027}}` **lēistḗs**, or robber.
### Biblical Occurrences & Contextual Analysis
In its literal sense, `{{G2812}}` refers to one who takes what is not theirs. Jesus warns against laying up treasures on earth where **thieves** break through and steal [[Matthew 6:19]]. Judas Iscariot is identified as a **thief** because he held the money bag and would take what was put into it [[John 12:6]]. Figuratively, the term describes false spiritual guides; anyone who enters the sheepfold by another way besides the door is a **thief** whose purpose is to steal, kill, and destroy [[John 10:10]]. Most significantly, it is used as a metaphor for the unexpected coming of the Lord, who will arrive like a **thief** in the night ([[2 Peter 3:10]], [[Revelation 3:3]]).
### Related Words & Concepts
Several related words help clarify the concept of a **thief** and its implications:
* `{{G2813}}` **kléptō** (to filch): As the root verb, it means to **steal**. It describes the direct action of a `{{G2812}}` thief, whose intention is to **steal**, kill, and destroy [[John 10:10]].
* `{{G3027}}` **lēistḗs** (a brigand): This word for a **robber** is often paired with **thief**. It implies a more open and potentially violent plundering, in contrast to the stealth of a thief. Jesus states that all who came before Him were **thieves** and **robbers** [[John 10:8]].
* `{{G1127}}` **grēgoreúō** (to keep awake, i.e. watch): This is the command given in response to the unexpected coming of the Lord as a **thief**. Believers are urged to **watch**, because if they do not, He will come upon them unexpectedly [[Revelation 3:3]].
* `{{G1358}}` **diorýssō** (to penetrate burglariously): This describes the physical act of a thief who must **break through** a wall or house to steal earthly treasures ([[Matthew 6:19]], [[Luke 12:39]]).
### Theological Significance
The theological weight of `{{G2812}}` is significant and serves as a multifaceted warning.
* **Moral and Spiritual Corruption:** A **thief** is listed among those whose actions exclude them from God's kingdom, alongside the covetous and revilers [[1 Corinthians 6:10]]. Peter also warns believers not to suffer for being a **thief** or an evildoer [[1 Peter 4:15]].
* **False Leadership:** The term is a label for false teachers or prophets who do not enter by Christ, the true door. Their purpose is destructive, contrasting with Christ who comes to give abundant life [[John 10:10]].
* **Eschatological Suddenness:** The most prominent theological use of **thief** is as a metaphor for the suddenness and unpredictability of the "day of the Lord" and Christ's return. This imagery emphasizes the need for constant spiritual vigilance and readiness ([[1 Thessalonians 5:2]], [[Revelation 16:15]]).
### Summary
In summary, `{{G2812}}` is a potent word that moves from the literal act of stealing to profound spiritual realities. It characterizes a person of corrupt character, a false spiritual guide leading others to ruin, and serves as the primary biblical metaphor for the unexpected timing of the Lord's return. The term functions as a consistent call to believers to safeguard their hearts from sin and to remain watchful for Christ's coming.