In a prior episode, Oprah spoke with Eckhart Tolle about his book The Power of Now, a New York Times best-seller which established the author as one of today's leading spiritual thinkers. Now Eckhart returns to discuss his latest release, A New Earth: Awakening to Your Life's Purpose.

According to Eckhart, there is "a profound transformation that is taking place in the collective consciousness of the planet and beyond." Oprah talks with Eckhart about each individual's role in this global transformation and how each of us can contribute by discovering our calling.

• The Power of Now: A Guide to Spiritual Enlightenment and A New Earth: Awakening to Your Life's Purpose by Eckhart Tolle