what does the bible say?
When Adam sinned, God judged humanity with death (Genesis 3:16–19) such that every person born in the line of Adam has a corrupted nature (Romans 5:15, 19), is sinful from conception (Psalm 51:5), and under God’s wrath (Ephesians 2:3). God sent His Son, Jesus, to die in the place of such sinners (Romans 5:8). However, to do that, Jesus needed to be fully human but without humanity’s corruption.
While we do not understand the mechanics, being conceived by the Holy Spirit and born of the virgin Mary (Luke 1:35) meant Jesus was fully human yet not represented by Adam and thus not under his judgment of sin and death (Romans 5:12).
Not being corrupted by sin, Jesus had no sin and could die in the place of sinners. Denying the virgin birth attacks Jesus’ uncorrupted, sinless nature, and ultimately His ability to save. It also undermines Scripture and prophecy (Matthew 1:23). Therefore, it is not an optional doctrine.
Because the connection to Jesus' sinlessness might not be readily obvious, someone can be saved while ignorantly denying the virgin birth. Still, the truth of the virgin birth will eventually need to be embraced as it bolsters our understanding of who Jesus truly is—fully God and fully human, yet without sin—and strengthens our trust in His perfect work of salvation.
Rejecting the virgin birth risks distorting the foundation of the gospel, reminding us that the doctrines we sometimes take for granted are central to the hope and redemption God offers through Christ.