A leading New Testament scholar writes “10 Things You Should Know About Christmas” for the Crossway blog. Here’s number seven:

Andrew Lincoln, in his book Born of a Virgin?, has argued that the virgin birth is unhistorical while asserting that the incarnation could still be true in a spiritual sense. This, however, is contrary to scriptural teaching, which keeps the virgin birth and the incarnation together as two sides of one and the same coin. Only a virgin birth allows Jesus to be the God-man who combines two natures—human and divine—into one person as the early church councils went on record as affirming.