Oprah sits down with one of America's leading theologians, the Rev. Barbara Brown Taylor, who was named one of Time magazine's most influential people in 2014. The former Episcopal priest, religion professor and best-selling author explains why we should accept darkness in all its forms and how facing the unknown can be a spiritual practice. In her book "Learning to Walk in the Dark," she writes about how we can transform ourselves by facing the challenging situations in our lives head-on, including moments of profound sadness. Find out why Barbara believes people need to embrace the deepest shadows of their lives in order break through their fears and find strength.