…our argument for a mental world does not entail or imply that the world is merely one’s own personal hallucination or act of imagination. Our view is entirely naturalistic: the mind that underlies the world is a transpersonal mind behaving according to natural laws. It comprises but far transcends any individual psyche.
This notion eliminates arbitrary discontinuities and provides the missing inner essence of the physical world: all matter—not only that in living brains—is the outer appearance of inner experience, different configurations of matter reflecting different patterns or modes of mental activity.
Coming to Grips with the Implications of Quantum Mechanics