This is a story of impossibilities. Consider the impossibilities Mary faced in this story: She is a virgin and pregnant—she is having a child while she is a virgin. Impossible! No way! Won't happen! Joseph has to follow through on the marriage after he discovers Mary is pregnant. Impossible! Mary must avoid being stoned to death when the neighbors hear the news. Impossible!

Consider the impossibility Elizabeth faced. She was well past the childbearing age, and yet God says she is goi…