This means that the Christian faith is not based on myths and legends like other religions. The story of Christianity is historically verifiable. Peter spoke of this in his Second Epistle when he wrote, For we did not follow cleverly devised stories when we told you about the coming of our Lord Jesus Christ in power, but we were eyewitnesses of His majesty (II Peter 1:16).
So, the barrier to faith is not an intellectual one, but a heart that is hardened in unbelief because of egoism and pride. Any honest seeker who will lay aside their biased presuppositions and consider the historical evidence will also experience the affirming witness of the Holy Spirit in their heart and will know that Jesus Christ was truly born of a virgin. And if that part of the story is true, then we can have confidence that the rest of the story is true as well.