Flesh
Flesh as Physical Body
The most basic meaning of "flesh" in the Bible is simply the physical substance of the body. God formed Eve from a rib taken from Adam, then closed up the flesh (Genesis 2:21). The law speaks of flesh in connection with food, sacrifice, and bodily conditions (Leviticus 4:11; 13:2-3). Paul distinguishes between different kinds of flesh: "Not all flesh is the same, but there is one kind for humans, another for animals, another for birds, and another for fish" (1 Corinthians 15:39).
From this physical sense, "flesh" extends to mean the whole body. Job says, "My bones stick to my skin and to my flesh" (Job 19:20). The Psalms use "flesh" to express physical exhaustion or longing: "My soul longs, yes, faints for the courts of the LORD; my heart and flesh sing for joy to the living God" (Psalm 84:2). The resurrected Jesus invited His disciples to touch Him, saying, "A spirit does not have flesh and bones as you see that I have" (Luke 24:39).
"All Flesh" — Humanity and Living Creatures
Scripture frequently uses "all flesh" to refer to all living creatures or to all humanity. Before the flood, God declared, "I will destroy all flesh in which is the breath of life under heaven" (Genesis 6:17). The prophet Joel announced that God would "pour out my Spirit on all flesh" (Joel 2:28), a prophecy Peter cited at Pentecost (Acts 2:17). Isaiah proclaimed, "All flesh shall see the salvation of God" (Isaiah 40:5; Luke 3:6).
This usage reminds readers that all living things share a common, fragile existence. "All flesh is grass, and all its beauty is like the flower of the field" (Isaiah 40:6). Human beings, for all their dignity, are creatures of dust who share the vulnerability of all mortal life.
Flesh as Human Weakness
A crucial biblical sense of "flesh" denotes human nature in its weakness and limitation, in contrast with God's power and spirit. "The Egyptians are man, and not God, and their horses are flesh, and not spirit" (Isaiah 31:3). When Jesus found His disciples sleeping in Gethsemane, He said, "The spirit indeed is willing, but the flesh is weak" (Matthew 26:41).
This meaning does not imply that the body is inherently evil — a view held by some Greek philosophers but rejected by biblical faith. Rather, it recognizes that human existence is limited, mortal, and dependent. To trust in "an arm of flesh" (2 Chronicles 32:8; Jeremiah 17:5) is to rely on human resources rather than on God. "Flesh and blood" cannot inherit the kingdom of God (1 Corinthians 15:50) because mortal nature must be transformed for eternal life.
The incarnation itself affirms the dignity of flesh: "The Word became flesh and dwelt among us" (John 1:14). God did not consider the physical body beneath His dignity; He entered fully into human existence, taking on flesh in order to redeem it.
The Flesh and the Spirit in Paul
Paul develops the most theologically complex use of "flesh" in the New Testament. For Paul, "the flesh" often refers not merely to the body but to the entire orientation of fallen human nature — the self-centered disposition that resists God's will. "For I know that nothing good dwells in me, that is, in my flesh" (Romans 7:18). "The mind that is set on the flesh is hostile to God, for it does not submit to God's law; indeed, it cannot" (Romans 8:7).
Paul contrasts living "according to the flesh" with living "according to the Spirit." The works of the flesh include not only bodily sins like sexual immorality and drunkenness but also relational and attitudinal sins like jealousy, anger, rivalry, and envy (Galatians 5:19-21). Conversely, the fruit of the Spirit includes love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control (Galatians 5:22-23).
The solution to the flesh is not self-effort or asceticism but the work of the Spirit. "Those who belong to Christ Jesus have crucified the flesh with its passions and desires" (Galatians 5:24). "If you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live" (Romans 8:13). The Christian life is a daily reliance on the Spirit's power to overcome the pull of the old nature.
Flesh and the Incarnation
The doctrine of the incarnation depends on the biblical understanding of flesh. "The Word became flesh" (John 1:14) means that the eternal Son of God took on full, genuine human nature. Paul writes that God sent "his own Son in the likeness of sinful flesh and for sin" (Romans 8:3), and that Christ was "manifested in the flesh" (1 Timothy 3:16). The early church vigorously defended the reality of Christ's human flesh against Docetists who claimed He only appeared to have a body.
John makes the confession of Christ's true humanity a test of orthodoxy: "Every spirit that confesses that Jesus Christ has come in the flesh is from God" (1 John 4:2). The writer of Hebrews explains why the incarnation was necessary: "Since therefore the children share in flesh and blood, he himself likewise partook of the same things, that through death he might destroy the one who has the power of death" (Hebrews 2:14). Christ's flesh was real, mortal, and capable of suffering — and through it, salvation was accomplished.
The Resurrection of the Flesh
The biblical hope is not escape from the body but the transformation and resurrection of the body. Paul affirms that the body sown in weakness will be raised in power, sown a natural body and raised a spiritual body (1 Corinthians 15:42-44). The risen Christ showed His disciples His hands and feet, ate fish, and invited them to touch His flesh and bones (Luke 24:39-43). The resurrection body is not less physical than the earthly body but more — glorified, imperishable, and fully fitted for eternal life.
Biblical Context
Flesh appears throughout Scripture. In the Pentateuch it refers primarily to physical substance and living creatures (Genesis 2:21; 6:17). The prophets use it for human weakness versus divine power (Isaiah 31:3; 40:6). The Gospels record Jesus' teaching on the weakness of the flesh (Matthew 26:41) and the incarnation (John 1:14). Paul develops the most extensive theology of the flesh in Romans 7-8, Galatians 5, and Philippians 3:3-4. The epistles of John test orthodoxy by the confession of Christ coming in the flesh (1 John 4:2; 2 John 1:7).
Theological Significance
The concept of flesh is central to biblical anthropology, Christology, and soteriology. It affirms that the physical body is God's creation, not inherently evil, while recognizing that fallen human nature is inclined toward sin. The incarnation — the Word becoming flesh — is the supreme affirmation of the material world's value and the means of its redemption. Paul's flesh-Spirit contrast defines the Christian life as a reliance on the Holy Spirit rather than human effort. The hope of bodily resurrection affirms that God's redemptive plan encompasses the whole person, body and soul.
Historical Background
The biblical understanding of flesh must be distinguished from Greek philosophical dualism, which viewed the body as a prison for the soul. Plato taught that the soul was immortal and the body a temporary, inferior container. Gnosticism, which emerged in the late first and second centuries, intensified this dualism and denied the true incarnation of Christ. The early church fought vigorously against these views, insisting that God created the body good, that Christ took on real flesh, and that the resurrection of the body is central to Christian hope. The creeds affirm belief in 'the resurrection of the body' precisely to counter dualistic tendencies.