Like David, whom God plucked from obscurity as a lowly shepherd, Billy Graham was a country boy who grew up milking cows when the Lord chose him to preach the gospel and further His kingdom. Pastor Greg Laurie, author of Billy Graham: The Man I Knew, shares the story of how Billy Graham came to Christ and eventually became America’s best-known evangelist and Christian ambassador to the world. Reverend Graham once told Laurie, "I don't think I'm a very good preacher. But I think God has given me the gift of giving the invitation."