Scripture shows at least three main reasons why the virgin birth is an essential truth or doctrine.

One, the virgin birth proves the deity of Jesus Christ, that He is God. If Jesus was born like any other person—a natural conception with a human father—then He is just that: a man. A good man, a great teacher, maybe even a prophet. But not God in the flesh. The virgin birth, where the Holy Ghost was the Agent, proves that His origin is Divine. Look at what the angel Gabriel tells Mary: “The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God” (Luke 1:35). The “therefore” is key. This is how God steps into humanity without ceasing to be God.

Two, the virgin birth protects His sinlessness. And this is another huge point. Men are born with a sin nature passed down from Adam. If Jesus had a human father, He would inherit that same fallen nature, making Him a sinner. The virgin birth breaks the chain of inherited sin. The Lord protected Him from the common flow of human descent.

Three, the virgin birth fulfills prophecy. God is faithful to His Word. Long before Mary, there was a prophecy given in the Old Testament. The prophet Isaiah said, “Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel” (Isaiah 7:14). When Matthew is writing his Gospel, he points directly back to this. He says Joseph learned about the conception, “Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying, Behold, a virgin shall be with child, and shall bring forth a son . . .” (Matthew 1:22-23). The virgin birth is a sign—a guaranteed stamp of divine authenticity—proving that Jesus is the promised Messiah.