Sign
The Nature of Biblical Signs
A sign in Scripture is far more than a mere wonder or spectacle. It is a visible event or mark that communicates divine truth, pointing beyond itself to the reality and purposes of God. The Hebrew word carries the meaning of a mark, signal, or distinguishing token, while the Greek equivalent emphasizes the communicative function of the event — it signifies something about God's character and intentions.
Signs operate at the intersection of the visible and invisible worlds. They are addressed to the senses but intended for the soul, providing tangible evidence of realities that transcend ordinary human experience. Throughout Scripture, signs serve to confirm God's word, validate His messengers, and call people to faith and obedience.
Covenant Signs in the Old Testament
Several of the most important signs in Scripture are connected to God's covenants. The rainbow became the sign of God's covenant with Noah, a permanent assurance that the waters would never again destroy all life on earth (Genesis 9:12-17). Circumcision was established as the sign of the Abrahamic covenant, marking those who belonged to God's chosen people (Genesis 17:11). The Sabbath served as a sign of the covenant between God and Israel, a recurring reminder that God had sanctified His people (Exodus 31:13; Ezekiel 20:12).
These covenant signs shared common characteristics: they were instituted by God, not invented by humans; they carried specific theological meaning; and they were intended to be ongoing reminders of divine promises and obligations. The sign itself was not the reality but a visible pointer to the deeper relationship between God and His people.
Signs of Divine Power
God also used extraordinary events as signs of His power and authority. The plagues of Egypt were explicitly called signs, demonstrating God's sovereignty over Pharaoh and the gods of Egypt (Exodus 4:8-9; 7:3; Joshua 24:17). Moses performed signs before the Israelites — his rod becoming a serpent, his hand becoming leprous and then restored — to confirm that God had truly sent him (Exodus 4:1-9).
Gideon sought a sign through the fleece of wool to confirm God's commission before going into battle (Judges 6:36-40). Isaiah's children were given symbolic names that served as signs and portents to Israel (Isaiah 8:18). The prophet also offered King Ahaz a sign from the Lord, and when Ahaz refused, God gave the sign of Immanuel — a virgin would conceive and bear a son (Isaiah 7:10-14).
Signs in the Ministry of Jesus
The Gospel of John is particularly focused on the signs Jesus performed, recording seven major signs that reveal His identity as the Son of God: turning water into wine (John 2:1-11), healing the nobleman's son (John 4:46-54), healing the paralytic at Bethesda (John 5:1-9), feeding the five thousand (John 6:1-14), walking on water (John 6:16-21), healing the man born blind (John 9:1-7), and raising Lazarus from the dead (John 11:1-44).
John explicitly states his purpose: "Jesus performed many other signs in the presence of his disciples... but these are written that you may believe that Jesus is the Messiah, the Son of God" (John 20:30-31). The signs were not mere displays of power but revelations of who Jesus was.
Jesus also warned against seeking signs for their own sake. When the Pharisees demanded a sign, He responded that no sign would be given except the sign of the prophet Jonah, pointing to His own death and resurrection (Matthew 12:38-40). This "sign of Jonah" became the ultimate sign — the resurrection itself.
Signs and Sacraments
The concept of signs extends into the sacramental practices of both Israel and the church. The Passover feast was a sign recalling God's deliverance from Egypt (Exodus 13:9). The brazen serpent in the wilderness, which brought healing to those who looked upon it, was a sign that foreshadowed the cross (Numbers 21:8-9; John 3:14-15).
In the New Testament, baptism and the Lord's Supper function as signs of spiritual realities. Baptism signifies death to the old life and resurrection to new life in Christ (Romans 6:3-4). The bread and wine of communion signify the body and blood of Christ given for the salvation of the world (Luke 22:19-20). These signs are not empty rituals but means through which believers participate in the realities they represent.
The Danger of Sign-Seeking
While signs are a legitimate form of divine communication, Scripture also warns about an unhealthy obsession with signs. Jesus rebuked those who would not believe without seeing signs and wonders (John 4:48). Paul contrasted the Jewish demand for signs with the preaching of Christ crucified, which seemed like weakness to sign-seekers but was in fact the power and wisdom of God (1 Corinthians 1:22-24).
Jesus also warned that false messiahs and false prophets would perform great signs and wonders to deceive even the elect if possible (Matthew 24:24). The capacity to perform signs does not automatically validate the one performing them; the content and direction of the sign — whether it points people toward the true God or away from Him — is the decisive criterion (Deuteronomy 13:1-3).
Biblical Context
Signs appear throughout the entire biblical narrative. In the Old Testament, covenant signs include the rainbow (Genesis 9:12-17), circumcision (Genesis 17:11), and the Sabbath (Exodus 31:13). The plagues of Egypt are called signs (Exodus 7:3). The prophets performed and predicted signs (Isaiah 7:14; 8:18). In the New Testament, Jesus' miracles are presented as signs, especially in John's Gospel (John 20:30-31). The apostles performed signs confirming the gospel (Acts 2:22, 43). Eschatological signs precede Christ's return (Matthew 24:3, 30).
Theological Significance
Signs reveal God's character, confirm His word, and call people to faith. They demonstrate that the invisible God communicates through visible means, bridging the gap between the divine and human realms. The ultimate sign in Scripture is the resurrection of Christ, which validates all His claims and confirms God's plan of salvation. Signs also carry a warning: they must be evaluated by their content, not merely their impressiveness, since false prophets can also perform wonders (Deuteronomy 13:1-3; Matthew 24:24).
Historical Background
The concept of signs was common in the ancient Near East, where omens and portents were regularly consulted. Mesopotamian cultures developed elaborate systems for interpreting celestial and natural phenomena as divine communications. Israel's understanding of signs was distinctive in that signs were tied to the personal will and covenant purposes of the one true God, not to impersonal forces or multiple deities. In the Greco-Roman world, miraculous signs were attributed to various gods and wonder-workers, providing the context in which the early church's claim of Jesus' signs had to be distinguished from competing claims.