With the sale of over 80 million copies of The Da Vinci Code book and a blockbuster film, the question is constantly raised: Is Jesus Christ really the Son of God, or was He just another human, but a better one?
The deity of Jesus (the assertion that He is both God and man) is so vital to the gospel that, if not true, there is no hope for salvation. If Jesus’ deity were not true, it would take the good news out of the gospel and make the story of Jesus a greeting card, and nothing more.
The Virgin Birth is a miracle. The Bible gives no details, scientifically, of how God did it. But what He does tell us is that it was by the power of the Holy Spirit. God came over a human womb, and a child was conceived—a child who was 100% man and 100% God, with a human mother and God as His father.
This miracle, in terms of apologetics, falls back on the attributes and power of the Father. Let’s consider these rhetorical questions:
The answer to all these questions is, of course, “Yes!” Romans 3:23 tells us we need a Savior. So God sent His Son in this miraculous way. Jesus was both God and man. He was God, so He was sinless; and yet He was man, so He could take our place. If you reject the truth of the Virgin Birth, you redefine Jesus as just a man. Do that and you remain in your condemned state before God, for only the blood of the incarnate Christ can cleanse you of sin (Hebrews 9:12). If you acknowledge this truth, believe on and place your trust in Jesus as the resurrected Son of God, you will be saved and have eternal life (John 10:27–28).
http://www.answersingenesis.org/articles/am/v1/n2/virgin-birth