αἴτιος

the cause of, the originator of

Definition

αἴτιος refers to someone or something that is the cause, originator, or responsible agent for an event or condition. In its most basic sense, it means 'the cause' or 'author' of something. In a legal context, it can denote 'the accused' or 'culprit' responsible for a crime. In the New Testament, its sole occurrence in Hebrews 5:9 uses it in a positive, salvific sense, describing Jesus as the 'source' or 'cause' of eternal salvation.

Biblical Usage

This word appears only once in the New Testament, in Hebrews 5:9, where it describes Jesus Christ: 'and having been made perfect, he became the source (αἴτιος) of eternal salvation to all who obey him.' Here, it is used in a profoundly positive theological context, identifying Jesus as the originating cause and author of salvation. This contrasts with its more common secular Greek usage for a legal culprit or the cause of a problem.

Etymology

Derived from the noun αἰτία (aitia, G156), meaning 'cause' or 'reason.' The adjective form αἴτιος essentially means 'causative' or 'responsible.' It is related to the verb αἰτέω (aiteō, G154), meaning 'to ask' or 'to demand,' suggesting a link to the idea of something being demanded or required as a cause.

Semantic Range

This word is theologically significant as it uniquely identifies Jesus Christ as the sole and sufficient cause of eternal salvation (Hebrews 5:9). It underscores the doctrine that salvation originates in and is accomplished by Christ alone, not by human effort. Understanding this Greek term enriches reading by highlighting the precise claim that Jesus is the author and source, not merely a facilitator, of salvation.

In Greco-Roman culture, αἴτιος was commonly used in legal and philosophical contexts to assign responsibility, often for a negative outcome (e.g., a crime). The New Testament's application to Jesus as the 'cause' of salvation subverts this typical usage, applying a term associated with blame to instead declare a supreme, positive benefit.

ἀρχηγός (archēgos, G747) — emphasizes being a pioneer, founder, or leader, while αἴτιος focuses on being the causative source. αἰτία (aitia, G156) — the noun meaning 'cause' or 'charge,' whereas αἴτιος is the adjective/noun for the person/thing causing.

Word Details

Scripture References