I’d heard of Nick Vujicic. I’d caught a glimpse of him on Christian television. But nothing prepared me for his recent appearance at my church. A mighty man of faith, Vujicic delivered one of most powerful, spirit-filled messages I’ve ever heard. I think the Australian-born evangelist the most inspirational Christ follower since Helen Keller. Keller’s life story was immortalized in the 1962 motion picture “The Miracle Worker.” Born in 1880, Helen was 19 months old when she contracted “brain fever,” as the Keller family doctor called it. She was struck blind, deaf and mute. Nearly feral as a child, Helen’s...