In the first of a special two-part podcast, Oprah has a conversation with her beloved mentor, the late poet, author, icon and activist Dr. Maya Angelou. She's also the woman Oprah called her mother, sister and friend for more than 30 years. Oprah says, "She was there for me always, guiding me through some of the most important years of my life. The world knows her as a poet, but at the heart of her, she was a teacher."