ἀσθενής

weak, infirm, sick

Definition

The adjective ἀσθενής (asthenēs) fundamentally means 'without strength' and is used in the New Testament in both physical and moral/spiritual senses. Physically, it describes those who are sick, infirm, or physically weak, such as the sick people Jesus heals (Luke 10:9) or those needing care (Matthew 25:39, 43-44). Morally and spiritually, it describes human frailty and inability, particularly the weakness of the human flesh that leads to failure, as Jesus notes in Gethsemane: 'The spirit indeed is willing, but the flesh is weak' (Matthew 26:41, Mark 14:38). In Paul's writings (though not in the key references provided), it extends to describing those of 'weak' conscience or faith (e.g., Romans 14:1; 1 Corinthians 8:9).

Biblical Usage

ἀσθενής is used 23 times across the Gospels, Acts, and the Epistles. In the Gospels, it primarily describes physical sickness (Luke 10:9) and the inherent weakness of human nature (Matthew 26:41). In Acts, it refers to the physically infirm who are healed (Acts 4:9, 5:15). A significant pattern is its use in Matthew 25 in the parable of the sheep and goats, where caring for 'the sick' (τοὺς ἀσθενεῖς) is a mark of serving Christ. The word's application broadens in the epistles to encompass spiritual and ethical weakness.

Etymology

Derived from the alpha-privative ἀ- (a-, meaning 'not' or 'without') and the root *sthen-*, meaning 'strength'. It is a compound word literally meaning 'strengthless' or 'without strength'. This root is related to the noun σθένος (sthenos, G2479), meaning 'strength', though that word does not appear in the New Testament. The etymology clearly informs its biblical usage, covering any lack of strength, whether bodily, moral, or spiritual.

Semantic Range

This word is theologically significant as it highlights a core biblical theme: human limitation and dependence on God's power. Physical ἀσθένεια points to a fallen world in need of Christ's healing. Spiritual ἀσθένεια, especially the 'weakness of the flesh', underscores the human inability to achieve righteousness by willpower alone, thus pointing to the need for grace and the Spirit's empowerment (2 Corinthians 12:9-10). Understanding this Greek term enriches reading by connecting physical healing miracles to the broader biblical narrative of God overcoming all forms of human weakness through Christ.

In the first-century Greco-Roman world, physical weakness or chronic sickness often carried social and religious stigma, potentially being viewed as divine disfavor. The sick (ἀσθενεῖς) were frequently marginalized and dependent on family or charity. Jesus' and the apostles' ministry of healing the ἀσθενής was thus a powerful counter-cultural act of compassion and a demonstration of God's kingdom restoring wholeness. The concept of moral 'weakness' was also discussed in Greek philosophy, but the New Testament uniquely ties it to the human condition apart from God.

ἀρρωστέω (arrōsteō, G732) — a verb focusing more specifically on being sick or ill. νοσέω (noseō, G3558) — to be sick, often with a connotation of lingering illness. μαλακός (malakos, G3120) — can mean 'weak' or 'soft', but often in a negative moral sense (e.g., 1 Corinthians 6:9). ἀδύνατος (adynatos, G102) — means 'without power, impossible', emphasizing inability more than lack of strength.

Word Details

Scripture References