Brethren in Christ affirm Isaiah 7:14 as a messianic prophecy fulfilled in Jesus's birth. The passage speaks of a virgin bearing a son, understood as pointing to Jesus's unique incarnation. For BIC, the virgin birth affirms both Jesus's divine origin and his genuine humanity—essential to his role as redeemer and model for Christian discipleship.

The Anabaptist emphasis on Christ's humanity and his call to radical discipleship makes the incarnation central. The virgin birth testifies to God's gracious intervention in redemptive history and Christ's unique status as God's Son, born to teach and redeem through suffering and servanthood.