### Core Meaning & Semantic Range
The Greek word **aisthētḗrion**, represented by `{{G145}}`, refers to an organ of perception or, figuratively, **judgment**. Appearing only **1 time** in **1 unique verse**, it is translated as **senses**. The term describes a faculty for discernment that is developed through practice and is characteristic of spiritual maturity.
### Biblical Occurrences & Contextual Analysis
The single biblical use of `{{G145}}` is in [[Hebrews 5:14]], in the context of spiritual growth. The passage contrasts believers who are only ready for "milk" with those who are "of full age" `{{G5046}}` and ready for "strong meat" `{{G5160}}`. These mature individuals are described as those who, "by reason of use" `{{G1838}}`, have their **senses** exercised to discern both "good" `{{G2570}}` and "evil" `{{G2556}}`. The term signifies a developed, practical wisdom that distinguishes the spiritually mature.
### Related Words & Concepts
Several related words from its context illuminate the meaning of `{{G145}}`:
* `{{G1128}}` **gymnázō** (to train): This word, translated as "exercised," indicates that the spiritual senses are not passive but must be actively trained, much like an athlete [[Hebrews 5:14]]. It is also used in the context of being exercised by chastening [[Hebrews 12:11]] and exercising oneself toward godliness [[1 Timothy 4:7]].
* `{{G1253}}` **diákrisis** (judicial estimation): This is the purpose for which the senses are exercised—for "discernment." It highlights the ability to make a judgment between two things, such as good and evil [[Hebrews 5:14]] or to engage in the "discerning of spirits" [[1 Corinthians 12:10]].
* `{{G1838}}` **héxis** (habit, practice): This word, translated as "use," explains that discernment is developed through practice and habit. The senses become trained through repeated application [[Hebrews 5:14]].
* `{{G5046}}` **téleios** (complete, perfect): This describes the state of those "of full age" who possess exercised senses. The term points to a state of maturity and completeness, which is the goal for believers ([[Hebrews 5:14]], [[Matthew 5:48]]).
### Theological Significance
The theological weight of `{{G145}}` is focused on the nature of Christian maturity.
* **A Mark of Maturity:** The development of spiritual **senses** is presented as a key indicator of being "of full age" `{{G5046}}`, signifying a move beyond foundational doctrines to the "strong meat" `{{G5160}}` of the faith [[Hebrews 5:14]].
* **Discernment Through Practice:** These perceptive faculties are not granted in full at once but are "exercised" `{{G1128}}` "by reason of use" `{{G1838}}`. This establishes the theological principle that spiritual discernment is a skill honed through the habit of applying truth.
* **The Goal of Moral Judgment:** The primary function of these trained **senses** is to "discern both good and evil" [[Hebrews 5:14]]. This connects spiritual maturity directly to the practical, moral, and ethical navigation of a believer's life.
### Summary
In summary, `{{G145}}` **aisthētḗrion**, though rare, is a crucial term for defining spiritual maturity. It emphasizes that Christian growth involves more than acquiring knowledge; it requires developing a trained, perceptive faculty for **judgment**. The word links the concepts of consistent practice, completeness, and the vital ability to distinguish good from evil, illustrating that mature faith includes a well-exercised capacity for moral discernment.