Rahab was a Canaanite prostitute living in Jericho when Joshua sent two spies to reconnoiter the city. She hid them under stalks of flax on her roof, lied to the king's men about their whereabouts, and then confessed the most remarkable theological statement of any Gentile in the Old Testament: "The LORD your God, He is God in heaven above and on earth beneath" (Joshua 2:11). She knew. The whole city knew. But only Rahab acted. She made the spies swear to spare her and her family, and marked her house with a scarlet cord. When Jericho fell, "only Rahab the harlot and all who were with her in the house shall live" (Joshua 6:17). Rahab then "dwelt in Israel to this day" (Joshua 6:25). Two millennia later, Hebrews lists her in the hall of faith: "By faith the harlot Rahab did not perish with those who did not believe" (Hebrews 11:31). James names her alongside Abraham as an example of works vindicating faith. And most astonishingly, Matthew names her in the genealogy of Jesus Christ (Matthew 1:5) — the Canaanite harlot is an ancestor of the Messiah. Rahab is the Bible's loudest testimony that no background, no past, and no sin is too great for the redeeming grace of God.