Bob Roth is a famous American Transcendental Meditation (TM) teacher, CEO of the David Lynch Foundation, and the Director of the Center for Leadership Performance. In 1972 Bob began to study TM with Maharishi Mahesh Yogi, the Beatles' guru, a physicist, and founder of the TM movement. Nicknamed "Meditation Bob" by David Letterman, he has now taught TM for over 40 years, including to numerous celebrities like Tom Hanks, Oprah, Hugh Jackman, Martin Scorsese, Katy Perry, and Russell Brand. Bob's non-profit foundation has brought meditation to over 1 million kids and serves at-risk students, military veterans, and women and children who have experienced domestic violence. He has also written two books, Maharishi Mahesh Yogi's Transcendental Meditation and Strength in Stillness. In this episode, we talk about how Bob started teaching meditation to celebrities, the underlying psychological mechanics of TM, and the scientific research findings regarding TM's effects on the brain.