The divine intrusion

This morning I was reading on the virgin birth of our Savior when I came across this quote:

"The virgin birth is a sign of God's judgment on human nature. The race needs a redeemer, but cannot itself produce one; not by its own decision or desire, not by the processes of education and civilization, not as a precipitate of its own evolution. The redeemer must come from outside. Here, as elsewhere, 'all things are of God'. He provides the lamb (Gn.22:8).

[Karl] Barth is exactly right: 'Human nature possesses no capacity for becoming the human nature of Jesus Christ.' Also, the virgin birth is a sign that Jesus Christ is a new beginning. He is not a development from anything that has gone before. He is a divine intrusion: the last, great, culminating eruption of the power of God into the plight of man... (Don Macleod, The Person of Christ, 37).