1. The Historical Setting of the Prophecy
In the days of Ahaz, king of Judah, the kings of Syria and Israel allied against Jerusalem. Ahaz and his people were terrified. The Lord sent the prophet Isaiah to Ahaz, saying, "Take heed, and be quiet; do not fear or be fainthearted." God offered Ahaz a sign: "Ask a sign for yourself from the Lord your God; ask it either in the depth or in the height above." But Ahaz, in false piety, refused, saying, "I will not ask, nor will I test the Lord." Yet God gave a sign regardless, for His purposes would not be thwarted by the unbelief of a king.
2. The Prophecy of the Sign
Isaiah said, "Hear now, O house of David! Is it a small thing for you to weary men, but will you weary my God also? Therefore the Lord Himself will give you a sign: Behold, the virgin shall conceive and bear a Son, and shall call His name Immanuel." The sign was not from Ahaz but from God Himself. It would be a supernatural sign, beyond human explanation. The Hebrew word used is almah, which means an unmarried woman of marriageable age who is a virgin. This word always carries the meaning of sexual purity and virginity in the Old Testament.
3. The Meaning of the Name Immanuel
The child would be called Immanuel, which means "God with us." This is the most significant name given in the prophecy. It declares that in this child, God Himself would dwell among His people. The name is not merely a description of His character but a declaration of His nature. He would be not just a prophet sent from God, not just a king anointed by God, but God Himself present with His people. Matthew later explains that this name describes the incarnation: God taking on human flesh to live among His creation.
4. The Immediate and Ultimate Fulfillment
The prophecy had both an immediate and an ultimate fulfillment. In the near term, a child would be born in the days of Ahaz as a sign that God was with Judah and would deliver them from Syria and Israel. Before that child knew to refuse evil and choose good, the land of those two kings would be forsaken. Some interpret this immediate fulfillment as the birth of Isaiah's son Maher-Shalal-Hash-Baz. But the ultimate fulfillment was the birth of Jesus Christ to the virgin Mary. The prophecy could not be exhausted by a child born in Isaiah's day, for only Christ is truly "God with us."
5. The Fulfillment in the Birth of Jesus
Matthew explicitly declares that the prophecy was fulfilled in Jesus Christ: "Now all this was done that it might be fulfilled which was spoken by the Lord through the prophet, saying: 'Behold, the virgin shall be with child, and bear a Son, and they shall call His name Immanuel,' which is translated, 'God with us.'" Mary was a virgin, betrothed to Joseph, having known no man. The Holy Spirit came upon her, and the power of the Highest overshadowed her. The child conceived in her was of the Holy Spirit. Joseph did not know her until she had brought forth her firstborn Son, and he called His name Jesus.
6. The Virgin Birth Demonstrates the Deity of Christ
Jesus was not merely a man upon whom God came; He was God from the moment of conception. The virgin birth is the means by which the eternal Son of God took upon Himself human nature without ceasing to be divine. He who was in the form of God emptied Himself, taking the form of a servant, being made in the likeness of men. He did not become God at His baptism or at His resurrection; He was God in the womb. The virgin birth preserves the truth that Jesus is both fully God and fully man, one Person with two natures.
7. The Virgin Birth Secures the Sinless Nature of Christ
Because Jesus was conceived by the Holy Spirit and not by the seed of a human father, He was born without the inherited corruption of Adam. All descendants of Adam inherit his fallen nature. But Jesus is the second Adam, the seed of the woman, not the seed of man. He was holy, harmless, undefiled, separate from sinners. The angel told Mary, "That Holy One who is to be born will be called the Son of God." His sinlessness was necessary for Him to be the perfect sacrifice for sin. A sinner could not die for sinners. Only the sinless Lamb of God could take away the sin of the world.
8. The Virgin Birth Fulfills the First Prophecy of the Seed of the Woman
The prophecy of the virgin birth is the unfolding of the original promise in Genesis 3:15, where God spoke of the "Seed of the woman." Normally, offspring are spoken of as the seed of the man. But God specifically said the seed of the woman. This veiled promise pointed to a unique birth where the father would not be a human man. Isaiah's prophecy made it explicit: a virgin would conceive. The two prophecies are linked. The promised Redeemer would be born of a woman, without a human father, because He would be the Son of God.
9. The Virgin Birth and the Rejection of False Christologies
The virgin birth guards against several false teachings. It refutes adoptionism, which teaches that Jesus became the Son of God at His baptism. It refutes Arianism, which denies the full deity of Christ. It refutes the idea that Joseph was the physical father of Jesus. It refutes any notion that Jesus was a mere man or an angel. The virgin birth is essential for orthodox Christology. Denial of the virgin birth is denial of the biblical testimony concerning who Jesus is. John declares that every spirit that confesses that Jesus Christ has come in the flesh is of God.
10. Immanuel: God with Us for Salvation
The name Immanuel is not merely a title; it is the sum of the gospel. God, in His mercy, did not remain distant from His fallen creatures. He came to dwell among them. He took on flesh. He tabernacled among us. He dwelt in the midst of His people, full of grace and truth. He came not to judge the world but to save it. "God with us" means that He is not against us. In Christ, God reconciled the world to Himself. He is with us in our trials, with us in our temptations, with us in our suffering, and with us unto the end of the age. Immanuel is the assurance that God will never leave nor forsake His people.
Conclusion
The prophecy of the virgin birth is a cornerstone of the Christian faith. Given by Isaiah in a time of national crisis, it pointed forward to the greatest crisis of all: the sin of the world and the need for a Redeemer. That Redeemer would be born of a virgin, called Immanuel, God with us. In Jesus Christ, the prophecy was fulfilled. He is the virgin-born Son of God, sinless and divine. He is God with us. Let every believer rejoice that the Creator entered His creation to save it. Immanuel has come. He will never leave.