Sam Harris speaks with Bart D. Ehrman about the prophecies contained in the book of Revelation. They discuss his latest book, "Armageddon," and widespread Christian beliefs about the coming end of the world.

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Learning how to train your mind is the single greatest investment you can make in life. That’s why Sam Harris created the Waking Up app. From rational mindfulness practice to lessons on some of life’s most important topics, join Sam as he demystifies the practice of meditation and explores the theory behind it.