BIBLE GREEK WORD STUDY
Sarx (σάρξ) — Meaning & Usage in the Bible
Sarx (σάρξ, Strong's G4561) is a Greek noun meaning 'flesh' — the physical body of humans or animals, and by extension human nature, kindred, or what is external to the spirit.
Meaning of the word
The Greek noun σάρξ (sarx) literally refers to flesh — the soft tissue of a body, whether human or animal. In its strict sense the word pictures the meat of an animal, the substance stripped of the skin. This concrete, physical sense is the starting point from which the word's wider meanings develop.
By extension, σάρξ denotes the body itself as the material, visible part of a person, often set in contrast to the soul (ψυχή) or spirit (πνεῦμα). It can stand for human nature with its physical weakness and moral frailty, and for what is external, transient, or visible to the eye.
The word also serves as a relational term: because blood and flesh are shared by kin, σάρξ can mean kindred or family bond (as in 'his own flesh' for a blood relative). In every case the accent falls on the physical, tangible, earthly side of human existence.
Usage in Scripture
In the Gospel of John, σάρξ marks the profound mystery of the incarnation: 'The Word became flesh' (John 1:14). The same Gospel contrasts flesh and Spirit — 'That which is born of the flesh is flesh' (John 3:6) — and uses 'flesh' as the sphere from which the children of God are born (John 1:12).
In Acts, Paul and the apostles speak of σάρξ in ordinary bodily and relational ways — David's flesh dwelling in hope (Acts 2:26), the fruit of his loins in the flesh (Acts 2:30), and Paul, separated to the gospel according to the fleshly lineage of Jesus (Acts 2:31; Romans 1:3). In Romans, σάρξ often names the outward, ceremonial, or morally weak side of human life: outward circumcision in the flesh (Romans 2:28), no flesh justified by works of the law (Romans 3:20), Abraham as forefather 'according to the flesh' (Romans 4:1), and the infirmity of the believers' flesh (Romans 6:19).
The word in detail
- G4561 Lemma: σάρξ (sarx). A common NT noun (39 occurrences across 28 distinct verses) used for flesh as physical tissue, for the body in contrast to spirit or soul, for outward/visible human nature with its weaknesses, and for blood kinship.
Example verses
- John 1:14 Sarx marks the incarnation: the eternal Word took on full, real human flesh and dwelt among us.
- John 3:6 Flesh and Spirit are set in opposition: human birth produces fleshly, earthly life; Spirit-begotten birth produces spiritual life.
- Romans 3:20 Sarx here means humanity in its outward, works-oriented existence: no flesh will be justified before God by law-works.
- Romans 6:19 Flesh is used for the human weakness Paul accommodates in his speech — a frailty that limits how much his readers can absorb.
Common questions
Does sarx always mean 'sinful nature'?
No. Sarx literally means flesh or body. It can refer to the physical body (Acts 2:26), to blood kinship (Romans 1:3), to outward ceremonial status (Romans 2:28), and only contextually to the morally weak or rebellious side of human nature opposed to the Spirit.
Why is 'the Word became flesh' (John 1:14) theologically important?
By using sarx — the word for real, physical, human flesh — John stresses that the Son of God truly entered human nature, body and weakness, not just an appearance of a body.
How can one word mean both 'body' and 'kindred'?
Because blood and flesh are physically shared among family members, sarx naturally extends from the body itself to the relatives bound by that body — so 'his own flesh' can mean 'his own kin' (cf. Acts 2:30; Romans 1:3).