Diana Butler Bass, 100 Days of Gratitude

Author and religion scholar Diana Butler Bass has tried on many forms of Christianity, from growing up Methodist to becoming an Evangelical Christian for years and then joining the Episcopal Church, where she started exploring Centering Prayer and eventually meditation. Though her 10 books span a range of facets on Christianity, Bass says writing her most recent book, "Grateful: The Transformative Power of Giving Thanks," saved her life.