As founding pastor of Saddleback Church with his wife, Kay, Dr. Rick Warren leads a 30,000-member congregation in California with campuses in major cities around the world. As an author, his book The Purpose Driven Life has sold more than 34 million copies. As a theologian, he has lectured at Oxford, Cambridge, Harvard, University of Judaism, and dozens of universities and seminaries. As a global strategist he advises world leaders and has spoken to the United Nations, US Congress, Davos Economic Forum, TED, Aspen Institute, and numerous parliaments. Rick has also founded the Global PEACE Plan, which Plants churches of reconciliation, Equips leaders, Assists the poor, Cares for the sick, and Educates the next generation in 196 countries. You can listen to Pastor Rick's Daily Hope, his daily 25-minute audio teaching, or sign up for his free daily devotionals at PastorRick.com. The Washington Post called Daniel Amen, MD the most popular psychiatrist in America and Sharecare named him the web's #1 most influential expert and advocate on mental health. Dr. Amen is a physician, double board certified psychiatrist, television producer and ten-time New York Times bestselling author. He is the Founder and Medical Director of Amen Clinics in Costa Mesa and San Francisco, California, Bellevue, Washington, Reston, Virginia, Atlanta, Georgia and New York, New York. Dr. Mark Hyman is a practicing family physician, a six-time No. 1 New York Times bestselling author, and an internationally recognized leader, speaker, educator and advocate in his field of Functional Medicine. He is also the founder and medical director of The UltraWellness Center, chairman of the board of the Institute for Functional Medicine, a medical editor of The Huffington Post and a regular medical contributor on Katie Couric's TV show, "Katie." For more information, visit http://www.danielplan.com/.