Woody Allen once said that the world was divided into the horrible and the miserable. The horrible he thought were people with terminal cases, blind people, and the crippled. “I don't know how they get through life,” he said. “It's amazing to me.”

To answer Woody Allen's existential question, it is usually hope that carries the day. But the form that that hope takes can vary widely. Sometimes, it grows out of faith, sometimes out of denial and sometimes out of science. This is often true for both real cutting edge science, or the placebo that is most Western medicine.

Author and journalist Richard M. Cohen, has long lived with conditions Woody Allen would call horrible. Yet though his writings and his voice, he has not only defined his hope, he has given it to others. He does so once again in his look at stem cell research in Chasing Hope: A Patient's Deep Dive into Stem Cells, Faith, and the Future.

My conversation with Richard M. Cohen: