What is 'headlessness' and Douglas Harding's method?

Sam Harris, who has no relation to our beloved host, is a scientist, a controversial skeptic and the author of several New York Times bestsellers, including "The End of Faith," "The Moral Landscape" and "Waking Up" (also the title of his popular podcast). During our interview, Harris hosts a clinic on deconstructing "consciousness and its contents" with the help of meditation, and recognizing how getting lost in thought can be tied to suffering.