In January, 2008, a story made the rounds about a 15-year-old girl in Australia named Demi-Lee Brennan. Brennan became the world's first known transplant patient to change blood types from O negative to O positive, taking on the immune system of her organ donor. At first the doctors assumed someone had made a mistake, because it's always been assumed that a change like that can't happen. Now they say she's a "one-in-six-billion miracle."

The blood stem cells in Brennan's new liver invaded her body's bone marrow, taking over her entire immune system. She now has an entirely different kind of blood—blood that welcomes life, rather than carrying death. "It's like my second chance at life," Brennan says.

Something similar happens to us when we ask Jesus to save us. Even though he remains a human being like us, he has an entirely different kind of life than we do. He cannot die, and he lives with a kind of organic glory that mortals simply don't have—and couldn't contain. There's no mortality in him. When we put our faith in Jesus, he gives us that life.