This world is the unreal dream, that is the real and substantial one. So the glimpse teaches him. He views this world temporarily as if he stands behind a theatrical stage and watches actors perform set roles in a play and sees properties which are merely painted representations. He is conscious how utterly illusory it all is and, in dramatic contrast, how the awareness by which he knew this was alone real.

-- Notebooks Category 22: Inspiration and the Overself > Chapter 6: Experiencing a Glimpse > # 317