Shortly after the death of their brother, Lazarus, Martha offers this confident response to Jesus's gentle challenge, echoing the confession of Peter: "Yes, Lord, I have believed that you are the Christ, the Son of God come into the world" (John 11:26-27). Her response to this question would change the course of her life--of all their lives. And to the extent that we echo her confession, it transforms us as well. In Who Does He Say You Are?,...