Since the world is never found to be apart from our own minds, we are forced to relate it to them. And since it is equally obvious that the surface part of them does not deliberately bring it into existence we are further forced to deduce, first, that the deeper and unconscious part must do so and, second, that this second part must be cosmic in nature and hold all other individual minds rooted in its depths. This deduction, arrived at by reason, is confirmed by experience but not by ordinary experience. It is confirmed by sinking a shaft down through the mind in mystical meditation and arriving at our secondary cosmic self.
-- Notebooks Category 21: Mentalism > Chapter 3: The Individual and World Mind > # 68
-- Perspectives > Chapter 21: Mentalism > # 9